use Snap / Snap (Pixels) now save to scene file

Previously, only Use Pixel Snap would save to the scene.
Tested and working for me, on Linux.
Merge pull request #318 from adolson/scene-snap-settings-save

2D scene snap settings save
-Added OpenSSL and HTTPS support
-Built-in version of the library for Windows, Android and iOS (other OSs use system one)
-Small fixes all around
Sort projects by last modified/accessed date in project manager
Merge pull request #356 from marynate/PR-pm-sort

Sort projects by last modified/accessed date in project manager
-OpenSSL Fixes
-Fixes to OpenSSL compilation (more)
-Fix bug in GDScript, now static functions can call static functions.
Merge remote-tracking branch 'upstream/master' into pair_symbols_tool
Fixes to constants in scope
Merge remote-tracking branch 'upstream/master' into pair_symbols_tool