Examples: Add HTML5 data-* attribute example

- DataTables 1.10 has the ability to source data for filtering and
  sorting from HTML5 data-* attributes. This example shows that ability
Packaging: Change composer.json descrptor name to use lower case

- Packagist requires that packages use only lowercase letters in their
  name (although the composer spec says nothing about this), so in order
  to make DataTables usable with packagist we need to change the name
  slightly.
Merge branch '1_10_wip' of github.com:DataTables/DataTables into 1_10_wip
Examples: Add HTML5 data-* attribute example showing DataTables 1.10's
ability to use data attributes as a data source