Clean up the installation section and mention pip.
Rough cut at adding a glossary section.  This could definitely use some improvements, proof reading, and lots of cross linking.
Hate to do this, but URI module docs were constructing messed up RST files, so removing examples for now.  Will ask someone to work on them.
fixing issue #1768: copy module can't overwrite/replace read-only files , As recommended checking the destination directory is writable, then creating a hardlink and doing an atomic replace
merging #2100 : New force flag, if the destination is not readable, removed read check on destination
reverting os.link to shutil.copyfile astmp file and destination can be in different partitions
cleaning up after rebase