Fix warnings.
Add .travis.yml

This builds all libraries and examples in both debug
and release for Linux and NaCl platforms.

Add travis build status image to README.mdown.

Also, split the linux dependency installation into
its own script: install-deps-linux.sh
Fix missing protocol method warning for iOS 6.0 addition
EAGLView.mm: fix indent
updates Xcode project to detect more warnings
Merge pull request #2511 from ricardoquesada/xcode_warnings

updates Xcode project to detect more warnings
Merge pull request #2496 from mchinen/mchinensedit

Fix missing protocol method warning for iOS 6.0 addition
Update AUTHORS
Fix iOS 4.3 JPEG loading (darken picture, alpha issue)
Merge pull request #2516 from rtissera/ios43_jpeg_fix

Fix iOS 4.3 JPEG loading (darken picture, alpha issue)
Update AUTHORS
Merge branch 'travis' of https://github.com/sbc100/cocos2d-x into sbc100-travis
fixed #2105: Adding Travis build support for linux and NaCl.
Merge pull request #2517 from dumganhar/iss2105-travis

fixed #2105: Adding Travis build support for linux and NaCl.
Update AUTHORS