Add Proofer task
Add Proofer gem
Speed up Nokogiri installation
Run Proofer on pull requests
Specify Proofer version
Require Proofer 1.5
Move Nokogiri constant global env
Upgrade Proofer to 1.3
Global env is an array
Ignore empty hash
Correcting link to java discussion

The issue regarding extension in Java is #79 and not #97
Merge pull request #305 from antoinesd/patch-1

Correcting link to java discussion
Document how to include Windows links and links with spaces

Resolves #301
Merge pull request #306 from Mogztter/issue-301

Document how to include Windows links and links with spaces
Use Proofer 1
Don’t run Proofer on Travis
Merge pull request #247 from penibelst/proofer

Proofer
Fix link targets from Quick Reference to User Manual.
Merge pull request #308 from bk2204/link-targets

Fix link targets from Quick Reference to User Manual.
Add reveal.js documentation (similar to deck.js one)