Remove buildConnector()

Instead of storing the application url in an attribut
and having to call buildConnector() each time one of the components
is updated, use a GetUrl() method which will build the url.

As this method is not called often,
this shouldn't have any impact on the performances.
Merge branch 'develop' into features/drop-buildConnector

Conflicts:
	src/mage.cpp
	src/mage.h
Make GetUrl() public
Merge pull request #12 from MiLk/features/drop-buildConnector

Remove buildConnector()