Attributes now table format

The attributes section of the readme.md is now adjusted to output in a
table format, showing names, descriptions, requirement level, default
values, and available values.
Description formatting change

Changed the description that is displayed to also output the
long_description from the metadata.rb file as that is more informative.
The long_description metadata item is now a part of the "overview". In
addition, the cookbook name is also included as the opening item for
clarity.
Merge pull request #1 from jhawkwind/master

Merging changes made in master to branch