BlackboardClient now uses one Mongo connection per host, port combination.

BlackboardClient now supports database authentication.
BlackboardReader has been updated for the new BlackboardClient.
Added Eclipse project files to gitignore.
Merge branch 'BlackboardClientDev' of C:/Users/jwillebrands/Dropbox/School/Jaar 3/Themaopdracht 9/HUniversal-Production-Utrecht into development

Conflicts:
	src/libraries/blackboardJavaClient/src/nl/hu/client/InvalidDBNamespaceException.java
	src/libraries/blackboardJavaClient/src/nl/hu/client/InvalidJSONException.java