Parsearg

+ restructured:

- ./parsearg/examples -> ./examples
- ./parsearg/tests -> ./tests
- ./parsearg -> ./src/parsearg

+ adjusted examples and tests to match restructuring
+ tweaked setup.py

+ README.md at top level (contains Quickstart)
+ moved README.org within ./doc

+ add full parseargs.examples.a.py and parseargs.examples.a_aa.py output

+ more tweaks to README.org

+ tweaks to README.org

+ added README.pdf to the distribution [just in case]