jobartifactparser begun, with failing tests
merged from master
added datadiff module for diffing dicts.  also new tinderboxprintline sub parser.
before stripping subparsers.  updated error parser, new test logs
refactor all parsing to subparsers
finished name change from parsers to artifact builders and sub parsers to parsers
moved builders into a single module.  parse_complete is now just complete
finished removing the job_type.  This and the previous commit.
fixed unit test files
fixed some test coverage
finished coverage
Merge pull request #32 from mozilla/log-job-artifact-parser

Log Job Artifact Builder and refactor