Minor documentation fix.
Merge branch 'rc/bundler' of https://github.com/rctay/sexp_path into rctay-rc/bundler
Introduce the `remaining` matcher.

Matches all remaining input, but has a few odd characteristics at the moment.
1. Any matchers found after it will be ignored
2. You cannot use it with a named capture
Actually add the `remaining` matcher...
Upgrade to use ruby 1.9 and ruby_parser
Ignore Gemfile.lock
Version bump to 0.5.0
Add note about the new remaining matcher.
Rakefile: omit setting libs

lib is already set by default.
tests: simplify sexp_path requires

Since we have already specified 'libs' in the rake test task, we need
not require an entire path.
shift all dependency specifications to Gemfile
specify rake, rdoc as dev dependencies
regenerate .gemspec