Added min-height to modal-header for modals with no header text
Dusting the docs

* Fix some typos, grammar, sentence structure
* Fix left-over error tr class
* Remove uneditable inputs section
* Make compatibility sections stand out as sidenotes
* Make modal example scrollable on big screens, too
* Make some examples more self-explanatory
Remove BOOTSTRAP_RESPONSIVE_LESS in css compile

No more needed in Bootstrap 3
fixed typo in typography documentation
add comma; more accurate code snippet
ignore local ruby version files
add modal variables and tweak padding for min-height on modal title
override normalize.css override
update docs bootstrap.css
Sidenotes instead of alerts

* I propose: make the docs rely more heavily on the new design language,
replace alerts (not the .alert examples) by sidenotes.
* Remove alert-heading class, which no longer exists in CSS.
more specific comment, better placement of code
swap all bold p tags in sidenotes for h4s
fixes #7191 and cleans up indenting some
more indenting
IE8 doesn't need help with responsive images, they work just dandy apparently (see http://jsbin.com/idesit/1)
Restore  on links in dropdowns as they are randomly breaking onto new lines
More work on the sidenotes

* Convert more inline advices (compatibility, dependencies, ...) to
sidenotes
* Add sidenotes for:
** Note on plugin dependencies in general
** Required padding for navbar-fixed- (incl. code snippet)
* Fixed text for the small tag
redo all the things
More contrast with code snippets in sidenotes
use spaces for indenting, not tabs /cc @juthilo