Added labels for cut-through plotting and pitch angles
Fixed label function
Increased epsilon to avoid invalid cell id bug
Fixed documentation
Added backstream separation algorithm
Fixed module import
Gyrophase angle plotting supported.
Also linedipole test variables added.
Merge branch 'master' of https://github.com/fmihpc/vlsv-python-tools

Conflicts:
	pyCalculations/calculations.py
Added outline and axis plotting into velocity grid by default
Added rankine-hugoniot data comparison
Backup commit
Merge branch 'master' into rankine
Added different rankine-hugoniot functions
Added rankine comparison