fixup ref test

* update some ref tests

- euler_isentropic_flow
- euler_sod_shock_tube_bernstein
needed because previously we employed a timestep that was too large,
because it only used the local cell width but not the smallest grid
spacing

* add ref test for FV euler sod shock tube

* update ScalarEq so that FV version can use non-periodic bdry conditions

* implement FV method for Euler equation

- also refactor timestep to work with DG and FV elements
- also refactored fv_update_step! methods to now accept buffers for bdry
  values

* remove more Riemann solver stuff

* remove non-existent export

* evict riemannsolver.jl and broadcast_[volume,faces,bdry]!

* evict Riemann solver related stuff from SRHD

* evict Riemann solver related stuff from EulerEq

* evict Riemann solver related stuff from ScalarEq

* convert all in EulerEq

remove unrelated file

* convert all in ScalarEq

* re-enable srhd_smooth test

update srhd_smooth reftest

* evict old broadcasting methods

Add a finite volume method for ScalarEq

See merge request !75

* add reftest fv_advection_sine

* migrate all of ScalarEq to use broadcast_*_2! methods

* add isperiodic method for meshes

* fix grid spacing computation for SpectralElement

* fixup parametric types to subtype Mesh1d/2d

* make TODO error more comprehensive

* fixup cfl usage; add abstractions for min grid spacing

* enable add mesh kwarg to Evolution setup in order to enable FV evolution

* add timestep! and rhs! for FVElement

* do away with the State(...) syntax

* add docs to dg_rhs methods

* add FV stepper

* limit dg_rhs.jl methods to Meshes with SpectralElement

* add mesh kwarg to Evolution so that we can use a spearate stepper based on mesh type

* add a scheme parameter to Mesh

* add FVElement type

Refactor CFL parameter usage

See merge request !74

* fix tests

* remove an unreachable check

can't be reached, because a error would be thrown earlier
when multiplying a number with nothing

* remove cfl field from Evolution struct

* move cfl parameter from Mesh to Evolution section

also update all reftest parfiles

* remove CFL field from Mesh

* apply CFL factor in evolve loop and not inside projects

call the right interpolator for HRSC/smoother.jl

See merge request !73

* call the right interpolator

Allow dispatch on second argument

See merge request !72

* enable mesh argument in broadcasting methods

* remove debug statement

* fix docs

* add unit test

* disable euler_sod_shock_tube_entropyav ref test

* fixup tests

* enable mesh as second arg for legacy mode

make main() accept numbers which correspond to testparfiles() list

See merge request !70

* make main() accept numbers which correspond to testparfiles() list

bump version

See merge request !69

* bump version

Cleanup

See merge request !68

* rm deps BenchmarkTools, GLob, InteractiveUitls, LaTeXStrings, REPL; update dg1dTests' dependencies

* remove Plots, PlotThemes, Interpolations

improve a few things in the `make_movie.jl` script

See merge request !63

* improve a few things

- avoid axis jittering by using the Inside() alignmode for axes
- allow to plot cell data as constant functions
- update manifest for v1.9

Improve `HeatEq`

See merge request !65

* add heateq_sine reftest

* rename reftest from heateq to heateq_gaussian

* rename numflux methods

* change time step heuristic to align with what nodal DG book suggests (p. 250)

* add sine initial data for heateq

Stepper for time evolution

See merge request !67

* fix evolve! by wrapping stepper result also in callback

previously we copied the stepper's result into the initial data buffer
but now we just swap the vectors
we now push a wrapper for the dynamic state vector (like we also use it
for the rhs_fn, timestep_fn) to the fullstep callback so that we don't
have to do the wrapping in projects

* teach pushfirst to CallbackSet

* avoid adding cfl twice

* disable the timestep-retaking tests as they are now deprecated

* grab cfl parameter from mesh parameters

* fix while condition to be aware of symbol return values

* fix up evolve test

* fix time stepping with Evolution type

- make a copy of initial data to initialize up1, because
  we need to allocate memory anyways and the stepper will also swap it before
  stepping
- apply cfl to timestep

* fix construction of Evolution type

- fix sanity checks for callbacks
- add sanity check for cfl
- introduce TimeStepAlgorithm super type and move all algorithm
  types into types.jl
- add docstring to Evolution type
- update tests

* update unit tests

* introduce a state full type Evolution so that we can evolve step by step

Fix CI

See merge request !66

* fix undef var

* fix vector signature

* try to capture and log full backtrace in ref tests

* revert some changes

* ignore v2.2.3 in PrettyTables in IntegrationTests

* what is the real error we see?

* wrap parameter printing into try-finally, because PrettyTables.jl causes the CI to crash here

* also upload errors.log

* log the captured error to a file

* also resolve before running ref tests

convert error to warning when unknown parameters are found

See merge request !64