Fix some incorrect bindings in PhysicsServer
Merge pull request #815 from Gerold31/fix-bindings

Fix some incorrect bindings in PhysicsServer
- Fix BaseButton "Click on Press" issue. Now a button correctly show its visual "Pressed" status when "Click on Press" is enabled and the button is clicked.
Merge pull request #817 from grabiller/radfac#004b

Fix BaseButton "Click on Press" issue. Now a button correctly show its...
Fix issue #821: GDScript now accepts single quoted as well as double quoted strings.
Fix some more incorrect bindings
Merge pull request #824 from Gerold31/fix-more-bindings

this is great,thanks! will fix the typos here
- Fix issue #802: randomize() now generate non-zero seed during the first hour of every days, the first minute of every hours and the first second of every minutes.
- Fix issue #391: GDScript now reduce constant expressions to constant and forbids constant assignment after being defined.
Merge pull request #832 from grabiller/#391

seems ok!
Merge pull request #829 from grabiller/#802

Fix issue #802: randomize() now generate non-zero seed...
Merge pull request #823 from grabiller/#821

Fix issue #821: GDScript now accepts single quoted as well as double quoted strings.
-Much improvement to baked light baker
-Fixed many bugs in stretch mode
-Fixes to camera project and unproject as consequence of the above
-added setget to script (documented in script doc)
-more fixes to collada exporter for blender