fix doc typo

one can find correct name of variable just few lines below the typo

document `template` option of tooltip & popover

Also capitalize column titles and descriptions.

Update to Jekyll 1.5.0

The 1.4.3 Windows bug is fixed, plus the encoding workaround isn't needed anymore.

Fixes #13066: Add z-index to the form control feedback icons so input groups don't render on top of them

Support for hovering on cell's with some state

Fix popover when using append

fixes #9461 - Make carousel ignore non-items in carousel-inner

Fix #13138: use underscore prefix to ignore directories

Add `homepage` Bower property