Changed tica load and save.
metric parser loads tica base metric from pickle inside HDF
Added tICA to metrics
Expose reduce at the msmb level, expose tICA at the reduce level
import tICA, not from tICA import tICA.  Necessary to expose load.
Possibly fixed parsers for simplified tica loader
More cleanup of metric parsers.
More cleanup
Changed lh5 to h5 for Gens.h5 in Assign.py
Corrected various lh5 -> h5 issues and other pre-msmb2.8 issues.
Changed import structure in tica, made load classmethod
More tICA cleanup in arglib etc
More cleanup in parsers
Merge pull request #341 from SimTk/ticaload

Simplify tICA load and save