Added parsing of rotation center from log file

And removed spurious white space (automatically, thanks to my editor).
`pep8` this thing
`pep8` this thing
`pep8` this thing
Partially `pep8` this thing
`pep8` this thing
Merge branch 'pep8'
Merge branch 'parse-rotation-center'

Conflicts:
	src/datasets.py
Merge branch 'master' of https://github.com/habi/grecoman into habi-master

Conflicts:
	src/datasets.py
Merge branch 'habi-master'