Adding pip requirements file

Added functions in setup file to pull in requirements for setuptools
Merge branch 'release/0.0.2' into develop
Merge branch 'develop' of ssh://stash.csiro.au:7999/darda/pysiss into develop

Conflicts:
	setup.py
Merge branch 'hotfix/0.0.2a' into develop

Conflicts:
	requirements.txt
	setup.py
Updating readme
Tweak first sentence
Merge branch 'develop'
Undo some bad changes