Minor text fix.
Merge pull request #5 from hartca/master

Minor text fix.
Update the introduction to two chapters
Update the singleton section
Add reference to the google testing blog
Add additional information for the factory pattern
Add additional information for teh decorator pattern
Update the facade chapter
Update the proxy section
Update active record
Add additional information about interpreter
Fix TOC
Update the template view
Add more information about the observers
Update the module pattern
Add basic information about command
Add additional information for command
Merge pull request #2 from mgechev/master

update patterns