Update changelog for 1.7.3
Update Releases requirement for needed bugfixes
Modified changelog w/o releasing...
Bump 1.7.3 for setup.py tweak
Permit Paramiko >=1.13 under Python 2.6+

Re #1105
Changelog re #1105, fixes #1105
Releases version bump for bugfix
Add modern doc building shizzle to dev-reqs, also remove whitespace
Start setting up split sites tree based on Paramiko's
First pass of moving WWW-only content to www site tree
Fix up some link/toc/index stuff
Remove prehistory from changelog

No longer matters; can be seen on old doc sites; difficult to hide cleanly
Initial import of tut/usage/api docs to new site
Add intersphinx back to www site.

Also fix up sys.path munging to match www site's file
Fix broken link
Make shared static path OS-agnostic
Unhide logo + tweak logo settings
Use latest alabaster for stylin' fixes etc
Re-add Fab-logo-appropriate link colors.

Now same as Paramiko again but meh
Nuke old docs tree, update other refs to docs files