Fixed problem with wrongly initialized sf::RenderStates::Default

This static variable depended on the global variable sf::BlendAlpha, which may not be constructed yet.
Removed Travis CI config.
Merge pull request #586 from LaurentGomila/feature/no_travis

Removed Travis CI config.
Fix build of the SFML target on OS X with Xcode
Removed vertical tab support from Text (#442).
Merge pull request #596 from Ceylo/bugfix/595_OSXFrameworkCreation

#595 Fix build of the SFML target on OS X with Xcode

Nevertheless, Xcode generator is not officially supported by SFML
Updated glext, removed glxext.

Removed glxext in favor of the system version.
add HTTP support for PUT and DELETE

Signed-off-by: binary1248 <binary1248@hotmail.com>
Fix the case where not having created a GlResource prior to calling Shader::isAvailable() would break context management. (#211)
Removed unused duplicate code
Reverted OS X implementation to non-ARC

 * Apparently, there were some leaks not reported as such
 * Support for 32 bits computer is restored
 * Fix memory leak in sfStringToNSString (related to #484)
 * Unapply context when closing the window, freeing memory

The following commits are related to ARC modifications:

 * 42f6e83dfbd73d8819287caddb250afd697729ba
 * 6edc4b951838771340512f7b91b27f05039ae606
 * f6c94451fb9262f52f537a4c5fff2309c2a89076
 * 324d4a18e716070582fc8e659387f9b72a3d42a3
 * 0d470561326bac4e8985bdbd5e139c9e3a276566

Commit ac28902b57094518e40b138b691b91f0f8004604 is the last one before the introduction of ARC.
Replaced deprecated functions on OS X 10.9
Fixed warnings in Cocoa example
Improved style of Cocoa example
Removed unnecessary check in cmake regarding the deployment target

 * Setting CMAKE_OSX_DEPLOYMENT_TARGET to something implies setting CMAKE_OSX_SYSROOT too
 * The default values are enough for most users
 * If someone is trying to compile SFML with 10.6 SDK it will simply fail later anyway
Renamed INSTALL_XCODE4_TEMPLATES to INSTALL_XCODE_TEMPLATES

Templates are compatible with versions 4 and 5 of Xcode.
Added config of Xcode templates according to CMAKE_OSX_ARCHITECTURES
Improved CMake script

 * Instead of configuring Xcode templates directly to /Library the files are first saved in CMAKE_CURRENT_BINARY_DIR
 * This avoid running CMake as root on some systems
Removed old documentation that doesn't apply anymore
Moved more responsibilities to SFOpenGLView

These changes will ease the implementation of mouse grab (#394)