Enforce LF line endings project-wide

Closes Issue #9
Add Talon dependency now that Mailgun has open sourced it!

http://blog.mailgun.com/open-sourcing-our-email-signature-parsing-library/
Install Talon directly from Mailgun's GitHub repo

Their pip install flow is currently failing.

See https://github.com/mailgun/talon/issues/1
[Typo] inboxapp -> talon for repo
Remove unused ports from Vagrantfile
[typo] thread -> threads
Removing webhooks documentation

Webhooks are being significantly refactored as we move to an application-centric model for the Inbox hosted solution. This documentation is deprecated.
Moving to latest version of Pygments for Swift code formatting support