v0.7.1

Fixes two bugs:

• Restrict "tweaked moments" for "free shape" by @HannoSpreeuw in #187 - irrealistic values were found from "tweaked moments" extrapolations for "ill-formed" islands.
• Fix 186 and 173 by @HannoSpreeuw in #190 - the --grid command-line parameter was not propagated correctly. Also, pyse --version will now give you the PySE version.

Subimage size for $\kappa * \sigma$ clipping back to the old default of 64 pixels (was 32 pixels).

Full Changelog: v0.7.0...v0.7.1