Merge pull request #18 from scrawl/master

Remove svn revision retrieval
update line endings for all files with CRLF (part 3)
Merge pull request #19 from maqifrnswa/master

update line endings for all files with CRLF (part 3)
link "dl" library if needed
fix #20 : change lazy RenderItem compression

(now done when adding new item instead of per-frame)
refactor related code
remove glu usage from OpenGL platform and demos
add MyGUIEngine to be linked to platforms (needed for non-static build)
add missing installation rules for platforms
added travis building support
Merge pull request #25 from psi29a/travis

added travis building support
add high level warnings
add option to use system GLEW library (MYGUI_USE_SYSTEM_GLEW)
Merge pull request #26 from psi29a/travis

set high level warnings for travis build system
Merge pull request #23 from maqifrnswa/system_glew

add option to use system GLEW library (MYGUI_USE_SYSTEM_GLEW)
update travis.yml: add cppcheck run, build demos and tools
fix travis.yml
fix some build options for clang
fix travis.yml
fix CMake clang detection
fix CMake clang detection