Added the ability to set an absolute height for the drop down, forcing the drop down to show a scrollbar if necessary. Also added pageup and pagedown functionality.
Update README.md

changed `appentTo` to `appendTo`
Support absolutely positioning the drop down on the left or right (to support narrow text areas)
Update README.md
Use element.isContentEditable. Preserve contenteditable undo stack.
Merge pull request #96 from ericktai/master

Support for absolute left/right placement
Merge pull request #87 from alan2wong/master

Support absolute height, scrollbar, pageup, and pagedown
Merge pull request #98 from mikol/master

Use element.isContentEditable. Preserve contenteditable undo stack.
Set empty string to strategy.placement by default
Set position: relative to the wrapper element
Bump the version to 0.2.5
Update README.md