Slider as Nav For

New feature to set slider as nav for other slider
Fix index html indent
Add sync exemple
Merge pull request #1 from SirKnightDragoon/asNavFor

As nav for
Merge pull request #2 from kenwheeler/master

Adding multiple vertical slides feature
Fix sync and add new feature focusOnSelect option.

Fix sync of the as nav for
Fix focusOnSelect

missing parseInt on Str index
Merge pull request #3 from kenwheeler/master

Uptate to last commit
Fix index NaN speed click
Fix code indent
Add missing option focusOnSelect exemple
Add compatibility focusOnSelect

Multiple slides compatibility
Add and remove slider
Add Settings and Methods
Merge pull request #4 from kenwheeler/master

Merge
Merge pull request #5 from kenwheeler/master

Update
Merge pull request #6 from kenwheeler/master

Update
Added pauseOnDotsHover option. Bumped version to 1.3.7
Bump version to 1.3.7
Prevent removing non-slick elements on destroy

Slick does not check if the elements it tries to unwrap are its own. This can cause removing original elements that should never be removed.
Added slickGetOption method to retrieve the value of an option.