Update filters for newly-added/removed source files.
Do not use functions that aren't fully supported by Emscripten yet.
Add files to VS projects.
Merge pull request #137 from evoskuil/master

Adding source files to VS project files.
iphone.sh -> ios.sh
<limits.h> is required for SIZE_MAX. Fixes Android build.
Share VS props files and increment package version.
Uupdate GSL reference in packaging script.
Merge pull request #138 from evoskuil/master

Share VS props files and increment package version.
Expose size_t crypto_shorthash_siphash24_keybytes(void);