Don't output HTML on CLI for lowlevelchecks. Fixes #1525
Temporarily setting all Symfony components to "2.5.x-dev", until the Form Validator issue is in a stable release.

See also: https://github.com/symfony/symfony/pull/11587
Fix regex for "insertAfterJs" hook.
normalize line endings
continue if no response
increase timeout before removing install response
setup install as separate ajax modal
change button
remove wrong twig block
move install stuff into separate modal
work on getting full stability info for install
pass in the bolt version to the install check
return versions as json response
seed the versions with empty array
add a loader
write versions to list
hide the loader on success
improved ui documentation
fix to template markup
show no results by default