Added minimum jQuery UI build info to site

The entire jQuery UI package weighs in at 228k after minifcation. The modules that are required for ember-table are only 55k after min. After digging through the code, it appears that only the following modules are required:

* core
* widgets
* mouse
* resizable
* sortable

So it would probably be helpful to include this info in the docs to avoid users downloading the entire package when it isn't necessary.
enableContentSelection option implemented via classNameBindings
Documentation for enableContentSelection switcher
Simple table example demonstrates selectable text in cells
Merge pull request #89 from davewasmer/patch-1

Added minimum jQuery UI build info to site
Merge pull request #105 from petrvolny/text-selection

Switcher that enables text selection in table cells
Update dependencies with Ember v1.4.0
Deprecated linkTo replaced with link-to
Deprecated bindAttr replaced with bind-attr
Update dependencies with Handlebars 1.3.0
Quoted action names within {{action}} helpers
Dist update
Merge pull request #106 from petrvolny/ember1.4.0-migration

Migration to Ember v1.4.0
Fix a few minor UI bugs

When using forceFillColumns, resulting table would always be
horizontally scrollable by 3px.

When dragging to reorder columns, header cell text would jump around
a bit depending on cursor position.

Total width of table was being calculated slightly incorrectly - it
was including its own borders (and potentially margin) in the
calculations.
Add link to new JS Bin example in the README
Merge pull request #126 from FellowMD/wiggle

Fix a few minor UI bugs
Simpler column resizing when forceFill is on.

Resizing a column in forceFill mode will now set the column's
canAutoResize property to true. Force fill will then fill remaining
space by adjusting any columns which canAutoResize.

If you try to resize the last (or only) column for which canAutoResize
is true, it will snap back to its original size. This is reasonable
behavior because you can still adjust it by resizing the other columns,
but the forceFill behavior is preserved.