gitignore update
Simple Ratio 2D correction fixed. Background subtraction is done with whole image, before statistics, not with the averaged value.
3D correction for simple ratio method also fixed like it was done with 2D
Replaced spaces with tabs in three locations, deleted two lines that was
commented.
gitignore modified, tags to /tags
Merge pull request #1 from cmci/master

Two fixes for the simple ratio methods