Remove .ruby-version file and add note to README regarding minimum Ruby version.

@imathis - look ok?

Closes #1365.
".git" added to sample string with SSH repository URL

Octopress does not work with a repo URL like a "git@github.com:your_username/your_username.github.io" ("ERROR: repository not found" error appears).
It is necessary to add ".git" to the end of this line.
Merge pull request #1367 from nagimov/patch-1

".git" added to sample string with SSH repository URL
fix old style gist url not found issue
Add proper disqus identifier comment count links

Fixes #277
Fix Disqus over https.

  Forcing http:// as protocol will make Disqus fail when server over
  https for security reasons.
Merge pull request #1384 from kAworu/fix-disqus-over-https

Fix Disqus over https.
Merge branch 'fix-gist-plugin' of git://github.com/aleiphoenix/octopress into aleiphoenix-fix-gist-plugin

* 'fix-gist-plugin' of git://github.com/aleiphoenix/octopress:
  fix old style gist url not found issue
Clean up Gist redirection.
Error handling FTW
Merge pull request #1385 from imathis/aleiphoenix-fix-gist-plugin

Handle Gists returning 302's
Merge remote-tracking branch 'upstream/master'
Add Talks section