Simplify getEffectMultiplier.

Both return cases were same, except for some overflow conditions.
Travis CI: enable OS X build

Refactor platform-specific calls from .travis.yml to separate .sh scripts.
Test suite still needs to be enabled & tested for OS X though.
Fix typo in comments.
Cleanup:  Don't call <environment obj>.get().

mEnvironment.get() is redundant.  Switch the call to resemble the
surrounding environment get() calls, instead.
Merge remote-tracking branch 'scrawl/master'
Hotfix for crash when deleting an actor
Fix HasSoulgem function to return number of soulgems
Document the return value of getEffectMultiplier.
Merge remote-tracking branch 'jordan-ayers/topic/misc-cleanup'
Add none texture filtering .It is fixes a bug with black objects in shaders glsles
changed android configs paths
fixes for shaders glsles
None texturing filtering enable for android by default
Implement terrain rendering in OpenCS (Fixes #1597)
Avoid out of range exceptions.
Merge remote-tracking branch 'scrawl/terrain'
Merge remote-tracking branch 'scrawl/master'
Make spells cast by scripts always succeed (Fixes #1993)