Add support for data: urls with base64 encoded jpeg or png
Removed debug output accidentally included in last commit
Extracted data url regexp and overall url regexp into constants
Corrected handling of subsequent points to 'm' relative move-to command

The SVG spec requires subsequent points to 'M' to be absolute and
'm' to be relative. That is, to generate the equivalent of 'L' and
'l' respectively.
Merge pull request #32 from vidarh/base64-image-support

Base64 "data:" image support
Merge pull request #33 from vidarh/path-move-to-fix

Corrected handling of subsequent points to 'm' relative move-to command
Fix matrix transforms (a,b,c,d,e,f) where b != c