added two small fixes to svg.pyx
Allow multiple transformations in single line
made currentColor refer to Svg's color property
added public attribute to current_color so that Gradient can access it
added test file that uses currentColor
fixed bounds on music.svg
Merge pull request #2587 from sbrother/svg_fixes

added three small fixes to svg.pyx
Widget docstring revision
Merge pull request #2593 from kivy/docstring_revision

Widget docstring revision