Use Emscripten application

[Squareys]

Hi @mosra !

As part of mosra/magnum#300, here are the ports of player and ui-gallery.

Best, Jonathan.

[mosra]

I guess I'll merge this after I fix the bug with animation progress being negative.

[codecov-io]

Codecov Report

Merging #10 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #10   +/-   ##
======================================
  Coverage    18.7%   18.7%           
======================================
  Files          35      35           
  Lines        1449    1449           
======================================
  Hits          271     271           
  Misses       1178    1178

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[Squareys]

@mosra This is also ready for the next review!

[mosra]

Looks good to me -- can you rebase on latest master and try w/o the assert hotfix?

[mosra]

Merged as a4caa32, 4828c09 and eca4562, the apps are also shipped on https://magnum.graphics/showcase/ and working nicely. I omitted 3ab1574 because while that one fixes it for cmd.exe, it breaks it on the macOS shell (Travis complaining):

ERROR:root:a problem occurred in evaluating content after a "-s", specifically  EXTRA_EXPORTED_RUNTIME_METHODS=[ccall] . one possible cause of this is missing quotation marks (this depends on the shell you are running in; you may need quotation marks around the entire  EXTRA_EXPORTED_RUNTIME_METHODS=[ccall] , or on an individual element)
Traceback (most recent call last):
  File "/usr/local/Cellar/emscripten/1.37.36/libexec/em++", line 15, in <module>
    python_selector.run(emcc, profile=True)
  File "/usr/local/Cellar/emscripten/1.37.36/libexec/tools/python_selector.py", line 43, in run
    sys.exit(run_by_import(filename, main) if on_allowed_version() else run_by_subprocess(filename))
  File "/usr/local/Cellar/emscripten/1.37.36/libexec/tools/python_selector.py", line 13, in run_by_import
    return getattr(importlib.import_module(os.path.basename(filename)), main)()
  File "/usr/local/Cellar/emscripten/1.37.36/libexec/emcc.py", line 909, in run
    raise e
NameError: name 'ccall' is not defined

This worked correctly on my bash, but apparently not on macOS. Not sure what's the proper fix 😅