cleanups/comments
extended widget redraw to include Fl::flush
added clone target cursor (xlib only)
clone cursor works in stock FLTK also now
forgot to remove some test defines
clone target didnt redraw when moved
shortened clone cursor drawing code a bit
fixed clone target being drawn in navigator
refactored/centralized drawing to screen using xlib etc
removed fltk-images dependency, using internal png loader now in widgets
wrote own decode uri method
adding .travis.yml, commenting some self-assignments
added check for fl_decode_uri in FL/filename.H
adding unit test for fltk version
added to rendera_LDFLAGS: fltk-config --ldflags
added check for libdl
fltk configure --with-shared
travis install libfontconfig1-dev
travis install libxrender
adding a bunch of libs for fltk