Update docs/configuration.md

register type mapping
Update docs/configuration.md
Update docs/configuration.md
Merge pull request #143 from volkan/master

How to register type mapping
Update docs/configuration.md

How to add new type
Update docs/configuration.md
Update docs/configuration.md

How to Use Two Connections
Adding master alias to allow installation of `0.*`
Merge pull request #144 from volkan/master

How to add new type
add more specific element type for bool and boolean
Initializing collector by subscribing to ZDT init event
instead of checking for variable in config.
Adding comments.
Adding collector name.
Merge pull request #151 from jhuet/adding-collector-name-to-zdt-view

Adding collector name to ZDT view
Added TestCase for issue #148
Adding missing comments and interface for init method.
Merge pull request #150 from jhuet/zdt-init-event-subscription

Initializing collector by subscribing to ZDT init event
Merge pull request #149 from jaapio/master

fix for issue #148 	
It is better to appent attributes then to overwrite them
formatting and improved the test to actually check the values