Working on LRU cache for resources.
Merge branch 'master' of https://github.com/highfidelity/hifi into joints
Basic LRU cache.  Closes #2234.
Applied Ryan's tweaks to Visage mapping and config file.
Slight tweak to Visage instructions (in order not to overwrite our custom
configuration).
fixes for warnings produced by Xcode 5.1
Merge pull request #2263 from birarda/master

fixes for warnings produced by Xcode 5.1
Merge pull request #2255 from ey6es/joints

Rather than unloading resources immediately when unused, use a simple LRU cache.
Merge pull request #2257 from ey6es/master

Applied Ryan's tweaks to Visage mapping and config file.