Copying login modal from shippable.com.
Merge pull request #24 from OneRedOak/master

Fix to Non-Collapsing Sub-Menus
updated addons and matrix tag
updating python samples
Merge pull request #26 from avinci/master

updating python samples
updating node samples
Merge pull request #27 from avinci/master

updating node samples
updating node samples
Merge pull request #28 from avinci/master

updating node samples
updating python samples
Merge pull request #29 from avinci/master

updating python samples
updating python samples
Merge pull request #30 from avinci/master

updating python samples
updating php samples
Merge pull request #31 from avinci/master

updating php samples
updating java samples
updating samples
Merge pull request #32 from avinci/master

updating java samples
updating Neo4j samples
adding more samples