Merge pull request #26 from Bartvds/master

Added chai-json-schema to plugins.js
Merge pull request #27 from Bartvds/master

Old typo in plugins.js for Chai Stats
update chai to 1.7.2
make docs 1.7.2:
view: [plugin] author name layout
Add chai-datetime

Close gaslight/chai-datetime#9
Merge pull request #28 from mguterl/patch-1

Add chai-datetime
plugins: [chai-times] add time category:
Fixed some minor spelling and grammar mistakes
Merge pull request #29 from synapsos/master

Fixed some minor spelling and grammar mistakes