Added approximately equal function to core
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Merge branch 'master'
fixed references to external modules
Agressively delete arrays during FFT Phase correlation
Use rfft2 instead of fft2 since we have real input.
Fix reference to external modules
Added module for common operations on tiles
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Refine the angle alignment once the approximate angle is found.
Remove brute alignment tasks as they complete
Be more aggressive about freeing memory
organized imports
Remove unused file
Add support for using cluster to assemble tiles
Organize imports via Eclipse Pydev
Rename function from TestOneAngle to ScoreOneAngle
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Renamed 'io' package to 'files' to prevent conflicts
Fixed calculation to size to next power of two
Added debugging feature to stos_brute
Version bump for renaming package
There is no need to expand an image if the overlap is more than 50%.  Results in smaller image sizes for alignment.
PadImage has an option to not scale up to the nearest power of two, but this is slower than scaling to a power of two.
Fixed double-padding of the non-moving image
Always ensure images are the same size before attempting alignment.  There was a bug with long skinny images before.
Pre-calculate image stats and send to threads instead of having each thread calculate seperately.