Point light shadows. There could be some problems on Intel videocards (?) and old Macs (?);
Falloff mode as light property;
Inverse squared falloff mode.
Minor fixes
Fixed falloffMode not recompiling shaders on change;
Added docs for falloffMode.
doc fix
Added metadata to particle system curves to support between two curves editing in Designer
Merge pull request #75 from guycalledfrank/point-shadows-falloff

Point shadows + falloff
Merge branch 'master' into feature/between-two-curves
[RELEASE] v0.159.0
[VERSION] v0.160.0-dev
Removed smoothness from particles, Changed default values of particle curves, Increased default texture resolution to 16x16
Merge pull request #76 from playcanvas/feature/between-two-curves

Support editing between curves in Designer, Changed default values for particles and other properties
Shadow resolution is now available for all light types
Set min scale to  0 for particles
Fixed wrong initialization of array type vectors
Changed default velocities to fire in all directions
Merge pull request #19 from playcanvas/master

merge