Multiple updates for including support for replica sets and slow queries

Hi All,

I've bundled a whole bunch of changes that won't affect the current functionality but will add some new features:

Changelog:
* Added .gitignore to prevent un-needed temporary or support files being committed.
* Added one directory per mongodb database support.
* Added mongodb replicaset configuration support.
* Corrected usage format in Readme file.
* Made spacing consistent across mongod.conf file.
* Added smallfiles configuration support.
* Added REST API configuration support.
* Removed excess whitespace for better readability of mongod.conf file.
* Added support for mongodb profiling to detect slow queries.