add font render type to choose

add font type, users can choose FTGLBitmap, FTGLBuffer, FTGLExtrd, FTGLOutline, FTGLPixmap FTGLPolygon and FTGLTexture to render text
add font render type to choose

add font type, users can choose FTGLBitmap, FTGLBuffer, FTGLExtrd, FTGLOutline, FTGLPixmap FTGLPolygon and FTGLTexture to render text. When I create a font with size 100, and use default FTGLTexture, ftgl crushs in FTTextureFontImpl::CreateTexture because new unsigned char[totalMemory] throw an exception. But use FTGLPolygon done well.
Update DrawInterface.h
Update DrawInterface.cpp
add drawWText to draw unicode

add drawWText to draw unicode
add drawWText to draw unicode

add drawWText to draw unicode
add unicode support

add unicode support
add unicode support

add unicode support
Merge pull request #93 from sufulow/master

add font render type to choose