FIX Move lcmv normal orientation picking

Ensures consistency with the minimum_norm implementation of picking the normal
orientation.
FIX Move normal orientation picking after noise norm calculation

Further ensures consistency with minimum_norm solution and fixes test for
normal orientation solution being precisely smaller than the free orientation
solution.
Merge pull request #634 from dengemann/add-scaling-and-labeling-to-topoplots

ENH: Add scaling and labeling to topoplots
Merge pull request #649 from dengemann/add-scaling-and-labeling-to-topoplots

ENH+FIX: refactor topo plot functions
Merge pull request #643 from rgoj/move-lcmv-normal-orientation-picking-for-consistency-with-minimum-norm

FIX Move lcmv normal orientation picking
ENH: add catchers to topomap