Add basic functionality to run nosetests in parallel -- getting errors though.
(#342)
Add missing import
Merge branch '#352' into #342

Conflicts:
	include/galsim/SBBoxImpl.h
	src/SBInterpolatedImage.cpp
	tests/test_correlatednoise.py
Only get the nosetests version if it is not None
(#342)
Merged #352 into this branch to test correlatednoise test thread safety
(#342)
Workaround for bug in python 2.6 multiprocessing
(#342)
Merge branch '#350' into #342
Merge branch '#352' into #342

Conflicts:
	CHANGELOG.md
	galsim/base.py
	src/SBMoffat.cpp
Fix bug from merge
(#342)
Merge branch 'master' into #342
Merge branch 'master' into #342
Resolved #352-related conflicts merging in master
(#342)
Merge branch 'master' into #342
merged in master, fixed a couple of minor conflicts
(#342)
Merge branch 'master' into #342
Merge branch 'master' into #342
Improve outputted text about nosetests version and numproc
(#342)
Merge branch 'master' into #342
Increase timeout period to 60 in case people are clashing with other jobs
(#342)
Add helpful message to lower number of processes if TimedOutExceptions are found.
(#342)