Make use of github optional
Whoops, missed a couple of extra uses of githubId
Tidy up use of github, and make error more descriptive
Fix URL rewriting error on empty URLs

Fixes #54, fixes #59
Add lexing support for content code in exercises

#52, #49, #46
Add context code support to exercises (optional)

Partial #52, fixes #49, fixes #46
Uglify output JS theme/assets/app.js
Bump version to 0.1.3
Merge branch 'optional-github' of https://github.com/mrpotes/gitbook into mrpotes-optional-github
Merge Optional github
Changes the default font from Helvetica to Open Sans. See #14
Removes helvetica font from repository
Removes unused font-family appLight
Merge pull request #62 from oliverh855/master

Changes the default font from Helvetica to Open Sans
Improve language normalization

Check for null before converting to lower case
Add better tests for ambiguous section detection
Fix URL creation on windows
Improve section detection, fixes #68
Merge pull request #77 from GitbookIO/improve/sections_lexing

Improve/sections lexing
Use API from node 0.8