Remove exceptions no longer used.
Move XmlException under Utility\Error
Move MissingViewException to View/Error
Move MissingDispatcherFilterException to Routing/Error
Move MissingHelperException, MissingLayoutException to View/Error
Move console related exceptions to Console/Error
Move controller related exceptions under Controller/Error
Move MissingPluginException under Core/Error
Move MissingBehaviorException under ORM/Error
Move SocketException to Network/Error
Remove ConfigureException. Just use Exception intead.
Remove AclException. Just use Exception instead.
Avoid use statement for exceptions within same namespace.
Rename Database/Exception to Database/Error.
fix misplaced semi-colon

Semi-colon when writing the "use as" statement moved to end of line.
Merge pull request #3315 from pjosephson/3.0

fix misplaced semi-colon
Merge pull request #3300 from ADmad/3.0-exception

3.0 exception
Adjust doc blocks according to convention.