Merge branch 'release/0.2.4'
Merge branch 'release/0.2.5'
Merge branch 'release/0.2.6'
Merge branch 'release/0.2.7'
Merge branch 'release/0.2.8'
Removed use of timedelta.total_seconds for Python 2.6 compatibility
Merge branch 'hotfix/0.2.9' into develop