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Merge pull request #441 from mbrochh/show_commit_message

Showing first 80 characters of commit message in HTML title
Only allow a single fetch_commits job at a time.

Fixes #280.
Remove dependency on pry, freeing up open4 ~>1.0 for use
Enable a 3 month commit search window
Minor updates to install script and vagrantfile
Fix a bug with syntax highlighting

We need to refer to a lexer by alias, even if the lookup matched on
filename.

Fixes #466.
Fix new vagrant box url
Back to lucid vagrant until we merge ubuntu-precise branch
Upgrade Vagrantfile for use with vagrant >=1.1

Fixes #442