PyCHRM requires a version field

[manics]

The latest verison of PyCHRM requires version information

[manics]

See https://github.com/wnd-charm/wnd-charm/blob/55bb3f9f54cd274cb6d2a31b34632a85c00c32e1/pychrm/FeatureSet.py#L77

For a description of the major.minor WND-CHARM versioning system. Briefly:

• Major
  • 2: current algorithm implementation
• Minor
  • 1: small feature set
  • 2: large feature set
  • 3: small colour feature set
  • 4: large colour feature set
  • 0: non-standard feature set (e.g. reduced)

[manics]

Resolved by #17