Fix doctest sensitive to dict ordering.
Flush after cythonize().
use sage/env.py to remove explicit references to SAGE_ROOT in docbuilding
cliquer: add patches to the repository
mpfr: add upstream patches to the repository
Consolidate Sage's Repositories
[CLEANUP] Add package-version.txt files
[CLEANUP] Mercurial-related data
[REORG] Final fix of file locations
[CLEANUP] Unused files
[CLEANUP] Add gitignores
(FIXUP) new sage-build script
(FIXUP) make sage-env and basic startup not depend on the spkg directory
(FIXUP) move build/install to git layout
(FIXUP) update prereq-install
(FIXUP) build/deps: core repositories

The core repositories are no longer spkgs, so their entries
needed rewriting in deps. Also, the root repository is no longer
installed, so nothing can depend on it.
(FIXUP) sage-spkg: support legacy spkgs
(FIXUP) sage-spkg: support local scripts
(FIXUP) update sage-starts
(FIXUP) copy csage, including headers