FIX: Spell grey consistently (following scikit-image).
FIX: Make as_grey work on frames shaped like (3, x, y).
FIX: Use TiffFile.series to return unreduced frames only.
ENH: Support detection of sub-subclasses of FramesSequence.
Merge pull request #93 from danielballan/fix-lsm

ENH : Fix lsm