Fix some issues installing the macosx backend as reported by Michiel de Hoon
Merge pull request #2250 from mdboom/fix-macosx-installation-issues

Fix MacOSX backend installation issues.
Allow for a minimum distribute version that is older than the downloaded version
Merge pull request #2254 from mdboom/distribute_minimum_version

Error with installing latest developer version of matplotlib on Travis
Fix bug in WebAgg backend on master
Fix font selection in texmanager
Do snapping in draw_path_collection
Merge pull request #2257 from mdboom/line_collection_offset

Offset between plot and LineCollection
Merge pull request #2260 from mdboom/texmanager-font-family-fix

texmanager font family fix
Fix #1547
Merge pull request #1547 from mdboom/qt4editor-formlayout-float-bug

qt4_editor/formlayout.py TypeError: float() argument must be a string or a number
Bump to version 1.3.0