Introduced an error check which prevents the user from saving a
pipeline_config.yml file with a blank "Pipeline Name" field, and also
warns the user when they load a pipeline config file with a blank
pipeline name field instead of just flat out crashing.
Introduced a warning for the user when a pipeline config file with a
blank pipelineName field is loaded (if the user removed it via text
editor), instead of crashing.
Added a check which prevents a crash from happening when the user tries
to load or edit a pipeline config with a pipeline name that is an
integer.
Added more thorough in-code documentation.
Improved documentation.
Made code changes to enable/fix parallelization in group analysis.
Added GUI option to specify how many cores to use in running group
analysis in parallel.
Introduced the option to turn off z-score standardizing for derivatives,
or have it on/off (apply warp to template and smooth on both z-scored
and non-z-scored derivatives).
Finalized changes for the ability to toggle z-score standardizing
derivatives.
Merge branch 'centrality_updates' of https://github.com/dclark86/C-PAC into dclark87-centrality_updates

Conflicts:
	CPAC/GUI/interface/windows/main_window.py
Fixed some errors in cpac_pipeline with redundant node names (no
num_strat append in node name), commented out a line from setup.py that
was problematic, and incremented the version number in __init__.py.
Removed function argument that is no longer used.
Fixed a potential error with output folder labeling which happens when
the amount of strategies is high enough so that the strat number reaches
double digits.
Improved timing code and run timing file creation for individual level
analysis in cpac_pipeline.py.
Improved naming of individual-level analysis timing .csv file.
Fixed potential errors in QC (histogram creation) that arose due to new
centrality measures (lFCD) being introduced.
Fixed some errors in applying ANTS registration to derivatives with
multiple subcategories (SCA ROI and Seed), revamped the timing code for
individual level analysis, and introduced some more error catches in the
QC code.
fixing/optimizing degree calculation
clean up of degree c code
revise centrality tests