Issue #65. Create window for image backend and display the output from image surface.
tests: Make roundedrect test use the shapes library
Allow taking a list of tests from the command line

E.g.:

  $ caskbench rect roundrect
Merge pull request #67 from Samsung/Issue_65

Create window for image backend.

ref: https://github.com/Samsung/caskbench/issues/65
Issue #27. Enable MSAA by default.
Cleanup whitespace
Up the number of iterations and size

These were set low for development, but 100/100 will better replicate
results from tests like canvas_perf.js
canvas_perf: Stub in script to replicate canvas_perf.js
canvas_perf: Set canvas dimensions to 480x480 like canvas_perf
Issue #36. RGB Color string parsing.

Ref: https://github.com/Samsung/caskbench/issues/36