Add basic logging

info.log will be created in the output directory. Currently is contains some basic info, including the start, stop, and elapsed time (in seconds) that fresco took to run.
Merge pull request #18 from jrrideout/issue-16

Add basic logging
Fixed bug which mispaired test results with test masks
Merge pull request #21 from rybern/refactoring

Fixed bug which mispaired test results with test masks
Merge branch 'master' into issue-14

Conflicts:
	fresco/command_line_wrapper.py