stopped tracking Sphinx Makefile
renamed README from txt to md for Github formatting
updated README, tried to add Github flavored md tables
reordered / reformatted README
Minor edit to README.md
added SIR Z var entry to README table
added AUTHORS.txt file
Phase unwrap first version kind of working.
Changed junit.jar to have no version number in build.xml
more minor chnages to phase-unwrap
Added coders section to Authors.txt file
Merge pull request #2 from iandobbie/phase-unwarp

Phase unwarp accepted - thanks Ian :-)