Fix Technique class to recalculate memory used based on numPasses.
Add and expose convenient methods to retrieve the Passes in the Technique based on the pass type StringHash.
Note the API breaking change. In AngelScript the Technique's "passes" property is now returning all passes without taking any index. Use the "GetPass(StringHash)" method to get a single pass instead.
Travis CI: API documentation update at 2014-10-26 05:16:35 UTC.
[ci package]
For Travis CI - switch CI build to use OS X build environment.