Change name of log_id to logging_id
Add logger.py, LogEntry object, plus tests
PEP8 fixes
Add test for LogEntry.create
Update Job and tests to use LogEntry
Merge branch 'master' of https://github.com/biocore/qiita into logger

Conflicts:
	qiita_db/job.py
	qiita_db/support_files/qiita-db.dbs
	qiita_db/support_files/qiita-db.html
	qiita_db/test/test_job.py
Merge pull request #146 from adamrp/logger

Logger