Simplify and organize _config.yml variables

Use data file to maintain site navigation
- Remove top navigation links from _config.yml

Update to Jekyll 2.2.0
- Using the theme for the first time install Bundler and then run 'bundle install'
- Updating the theme run 'bundle update' to update all gem dependencies

Ignore Gemfile.lock

Merge pull request #67 from earlew/master

minor fix to link color settings

fixed link colors

Fix allows users to change linkcolorhover, linkcolorfocus and linkcolorvisited from the variables.less file. In the original source code, the link color settings in typography.less did not match link colors settings in variables.less. This caused the link settings in the typography file to override the link settings in variables.less file.

Merge pull request #64 from kostrse/page-link-fix

Fix of post link icons after switch to Font Awesome.

Fix of page link icon after switch to Font Awesome.

Replace Icomoon icons with Font Awesome 4.1.0
- Fixes #63

Enable Pygments pre Jekyll 2.0
- GitHub Pages doesn't support highlighter: pygments, wait to switch

Merge pull request #58 from yihangho/exclude-files

Exclude Gemfile, Gemfile.lock, LICENSE and README.

Fixes #57

Update "read up here" link.

Exclude Gemfile, Gemfile.lock, LICENSE and README.

Merge pull request #55 from yihangho/master

Bump up the versions of Jekyll and other dependencies

Rename the 'pygments' option to 'highlighter'.
As recommended by Jekyll 2.0.0

Bump up all the versions.

Remove style conflict between Gist lines and navicon-lines.
Fixes #49

Merge pull request #47 from JCotton1123/master

Fix link

Fix link

Combine body styles