Explicitly specify foreman gem dependency in Gemfile

Procfile was already used but without explicit foreman dependency
github_url_to_file fixed
Added test for updated github_url_to_file
Fix extract_backtraces migration, account for notices without backtrace
Merge pull request #326 from nfedyashev/specify_foreman_dependency_explicitly

Explicitly specify foreman gem dependency in Gemfile
add gitlab to Gemfile.lock
Merge remote-tracking branch 'upstream/master'
Fixed BacktraceLine::IN_APP_PATH regexp issue
Reverted old changes to App.github_url_to_file method (spec fixed too)
Kaminari >= 0.14.1 in Gemfile
let us use a smtp server other than sendgrid
Merge pull request #337 from dmathieu/smtp_other_than_sendgrid

Use a SMTP server other than sendgrid
Use sendgrid as default email service, but allow developers to override SMTP settings with SMTP_* vars
Merge branch 'kaminari_version' of git://github.com/jlecour/errbit into jlecour-kaminari_version
Updated Gemfile.lock with kaminari version
Fixed GitHub and Bitbucket urls to files
added/updated stacktrace.js + added url
Merge pull request #338 from sdepold/feature/stacktrace-update-and-url-fix

added/updated stacktrace.js + added url
Fixed github_url_to_file spec
Merge pull request #330 from cr0t/master

Small update to github_url_to_file method