Issue #36. RGB Color string parsing.

Ref: https://github.com/Samsung/caskbench/issues/36
Issue #69. Update radius properly in animation case.
tests: No need for static stippled surface

ca_setup_mask() is only called once there's no benefit.  This cleanup
simplifies the code by a few lines.
Merge pull request #66 from Samsung/Issue_36

RGB Color code parsing. 

ref: https://github.com/Samsung/caskbench/issues/36
Merge pull request #74 from Samsung/Issue_69

Update radius properly in animation case.

ref: https://github.com/Samsung/caskbench/issues/69
Issue #72. Added command line option to list the tests available for execution.