Merge pull request #1 from jacek-ratzinger/master

add NUnit support for Concordion
Merge pull request #2 from jacek-ratzinger/master

Support for NUnit Attributes on Concordion Test Fixtures
rename to lower case "doc"
fix problems with image references
add information on additional bug fixes and where to find more versions of Concordion-NET
fix image reference
clean up documentation as preperation for release
renaming file to represent guidance on how to download
switch tabs
add description of configuration
add configuration tab to entire site
pimp the documentation
add standard visual studio files to gitignore
use all concordion:commands as lower case
remove Concordion.Spec.config as it causes problems with NUnit test execution
add NUnit test execution files to gitignore
start with a page for best practices: WYSIWYG, xhtml, templates, navigation, etc.
remove NetObjects Fusion from list of WYSIWYG editors, as it seems to not provide access to the html code for concordion tags
add information to use latest Concordion-NUnit-Addin on updates of Concordion
add link to blog about differences between tdd, bdd, and atdd