Bumped version to 4.0.1.rc.1
Load haml/template in Railtie

Resolves #636
Fix textarea content indentation inside partials

This commit fixes textarea behavior by stripping all leading space from
a textarea added as a result of Haml's indentation.

Leading space that is a part of the textarea content is preseved by
replacing the first space with a hexadecimal character reference.

Resolves #643
Don't test for preserved whitespace with older Rails versions.
Allow failures with JRuby.
Silence a silly warning in tests

In Rails < 4.0 this variable is initialized but unused
Fix partial path for Rails 3.0 in test.
Removing dependency on rails when plugging haml into ActionView.
Updated Changelog, bumped version
Fix html_escape failure with frozen strings

Closes #652
Merge branch 'stable'

Conflicts:
	CHANGELOG.md
Don't require fileutils in exec.rb

Fileutils was only used in --rails option, removed in
c3cdc567b1686a314fe6decfee4fe6bd8c50e3a7.
Don't test Ruby 1.8.7 with Rails 4+