Begin stage of adding gradient functionality to xournal
Architectural changes to allow for strokes to contain more than one color
Removed files accidently added previously
Removed another file
Some changes to get random gradient implemented, still needs work
Made changes so color gradient is no longer random and now depends on speed of writing
Files now can be successfully saved and loaded with the color variation feature
Fixed logical comparison that was accidently an assignment
Merged color gradient into master