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.
#298 imp
Merge pull request #330 from jonyrock/complex_undo

#298 imp - thanks!!! - hope you tested this well :)
pair symbols tool basic imp
#331 settings menu option title fix
#331 settings menu option title fix oops
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
EDITOR_DEF in the right place
setted font bug fix
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
Add multi-select to project manager
Fixes to constants in scope
Merge remote-tracking branch 'upstream/master' into pair_symbols_tool
Merge pull request #331 from jonyrock/pair_symbols_tool

pair symbols tool basic imp
Lots of 3D improvements:
-Object Manipulator Gizmo keeps proper scale in all windows and projections, (configurable on settings too).
-Manipulator gizmos for other objects (camera, shapes, etc) massively improved and bug-fixed.
-Manipulator gizmos are different for edited object and other objects.
-Properly highlight manipulator gizmo handles when hovered.
-Fixed bugs in fragment program when using more than 1 light together.
-Reload png/jpg files automatically in editor if edited externally.
-Added 4-stages Parallel Split Shadow Mapping, to improve shadow quality in large scenarios
-Added PCF13 to improve smoothness of shadow borders
-General optimization of directional light shadow mapping for Orthogonal,PSM and PSSM.
-Fixed normal mapping when importing DAE files, works nicely now.