Merge pull request #11 from rduivenvoorde/master

signal slot connecting to make add layers work
add Nationaal Georegister CSW to default connections list
pep8 fixes
make search tab the default on init
pick up server name from capabilities title to streamline workflow
carry state of plugin
adjust dimensions
shorten label
gui changes

rearranging of the widgets in the main dialog
make the server response dialog a little bigger