Fix typo

Compiler complained:
./QSTEM/libs/data_containers.h:229:35: error: ‘>>’ should be ‘> >’ within a nested template argument list
Merge pull request #1 from jat255/patch-1

Fix typo in data_containers.h
fix some formatting and casting errors that gcc pointed out.
Added license terms
Update License.txt

Removed how-to at end of GPL
Merge pull request #2 from msarahan/master

Add license terms
removed free of chisq - was crashing on Linux.
added primitive python script for reading .img files
add primitive plotting function for img files
Merge Christoph's fixes to cell offsets, wavefunction saving, and missing interimWave call.
removed free of chisq that was crashing on linux. (Regression.)  Cleaned up omp.h include.
small improvements to Python image plot formatting.
Merge pull request #3 from msarahan/master

Improve Python image plotting
pulled in rewrite of image header from Eigen
pulled in rewrite of image header from Eigen
Rewriting imagelib class to work with older pointer methods
reverted to master's copies of fileio - I was confused and wanted only imagelib.
Fix several disagreeing declarations/definitions.  Fix exception calls to be Linux-friendly.
Added boost as requirement for shared pointers.
Adding methods for wavefuncs to write their member arrays (waves, diff pats)