Merge remote-tracking branch 'origin/issue_6'
Merge remote-tracking branch 'origin/issue_5'
Merge branch 'master' of github.com:slayoo/drops.py
Merge branch 'issue_20' of github.com:slayoo/drops.py
Merge branch 'issue_22' of github.com:slayoo/drops.py
Fixing issue 26 with negative S_max, adding a relevant test case. Closes #26.
Merge branch 'issue_26' of https://github.com/slayoo/drops.py into slayoo-issue_26
small changes in issue_26.py test
Merge branch 'slayoo-issue_26'