Updated the Readme file so it no longer sucks.
Updated the Readme file so it no longer sucks.

README.txt
* rewrote the README in ReST (Re-Structured Text) format
* updated the list of features
* updated the list of supported directives
* added info about interpreter compatibility
* added install notes
* added a teaser to find more info on the projects home page

zaxebo1/pypreprocessor,mrjimenez/pypreprocessor,sylvandb/pypreprocessor,hendiol/pypreprocessor,nanonyme/pypreprocessor,evanplaice/pypreprocessor,assarbad/pypreprocessor