Merge pull request #180 from l2r-git/master

Tests for new sumatrix program.

Create README

New program to help with geometry and near surface QC.

Basic tests for new sunszonecsv program

Create README

new program to check refraction models and geometry.

Merge pull request #164 from l2r-git/master

Bug fix. Only strip between underscores if numbers outside.

corrected typos

files showing statics computations

Add files via upload

Merge branch 'master' into master

Merge pull request #172 from l2r-git/l2r-git-patch-1

Tests for new iecho=2 option.