Add utils file and helper methods to the dialog

The utils file was borrowed from another QGIS plugin in order to
use a 'standard' user experience.
Finish max-p method after OK from dialog

The workflow is complete. After running the algorithm the layer is
added to the Canvas if that option was selected.
Remove current references to min-p

The other algorithm is not ready for QGIS, so the references can
be deleted
Move ui files to a different directory

This will help when adding more algorithms and sections.
Updated the makefile and imports as well
Move elements in maxp dialog

Moved the output options inside the algorithm tab.