let run load single slice of data
Fix permutation bugs, allow loading from hdf5 pipe
Merge branch 'rondopatch' of rondo:Repo/pieman into dev
splice script now assembles in correct order. fixed permute out names
added test for splice_dir order. Context manager to chdirs
added subset option to run.load
slight change to subset argument in run.load
now able to load data sets by reference

This will be useful for when you want to use the full glory of unzipped
niftis. Fixed a minor bug that arises for numpy with keepdims arg on
subclass. Updated unit tests to ensure references are made and
simulation pipes work.
fixed mask argument to load mask
changed subset option to use path specified by config
fix default setting for max_len from None to False, added tests
Fix permute inputs/outputs, small updates to splice

permute script now casts data as float
puts r values as last dim

splice script can output as mat

changed arr_slice to use load_nii_or_npy
index array in single statement for speedup
fix subset component and loading, add copy method to Run

Run now has copy method and subset property.
Changed shift function to pad beginning of array with np.nan when h arg
is negative (previously returned exception, but there are some
participants who need to be shifted backward..)
load method now subsets before standardizing..
added memmap option to splicing
finished changing all pieman references to pycorr
Set up packaging structure. Started on docstrings.

In the process of setting up sphinx!
updated docstrings to google style
initial doc import