update blacklight.gemspec to use bootstrap-sass-2.3.1 and above

change bootstrap-sass dependency to allow 2.3.*

rebase and squash commits; change blacklight.gemspec to allow bootstrap 2.3.*
Remove unneeded require of 'mash'. Fixes #559
Add a post route for /catalog/email Fixes #557
Merge pull request #554 from ebenenglish/update-bootstrap

update blacklight.gemspec to use bootstrap-sass-2.3.1 and above
Update jruby opts for travis
Bump version to 4.2.1
Try different performance arguments for jruby
minor tweak to jetty_generator to pull blacklight-jetty v4.0.0
Merge pull request #560 from cfitz/master

fixing jetty_generator
Use devise 3.0.0.rc for rails4
Specify rails 3 or 4 in the gemspec
Remove rcov as ruby 1.8 is no longer supported
Bump dependency for final release of Rails 4
Test with the most recent release of rails 4.0
Bump version to 4.2.2
Applies Blacklight header style to #header-navbar-fixed-top .brand instead of .navbar .brand
in order to avoid trumping other Bootstrap navbars.
Sass code consolidated.
Fixes #569.
Redirect to home page on a missing document. Fixes #561
Add some test gems to blacklight so we can at least run helper tests without the test app
check that a highlight field exists before trying to render it. fixes #556
call the right helper in the show field value test