Added the --future switch back to the CLI
Added in --limit-posts
Removed migrate tasks from Rakefile.
Remove migrator files from jekyll.gemspec

Some files no longer exists but was not removed from jekyll.gemspec:
- lib/jekyll/commands/migrate.rb 
- lib/jekyll/migrators/*.rb
Bump .ruby-version to 1.9.3-p374
Merge pull request #799 from apodlaski/remove-migrators-from-gemspec

Remove migrator files from jekyll.gemspec
mention styleguide to new contributors
Merge pull request #806 from scribu/patch-1

Explicitly mention defacto styleguide
Updated History to reflect merge of #806
Upgrading to safe_yaml v0.7
Safe loading of files and YAML.
Updating tests for safe_yaml.
Merge pull request #801 from kevinSuttle/master

Bump .ruby-version to 1.9.3-p374
Update history to reflect merge of #801.
Relax Kramdown version to 0.14. Fixes #808.
Merge pull request #807 from mojombo/safeyaml-warnings

Fix SafeYAML Warnings
Update history to reflect merge of #807.
Changing help message to reflect what actually happens when running build and serve
Merge pull request #815 from bhardin/fixing_help

Changing help message to reflect what actually happens
Update history to reflect merge of #815.