Account for some temporary issues
Check for version conflicts ourselves.

This was done by cabal-install previously. But doing it ourselves, we gain a
few things:

* Found out about problems faster.
* Get a complete list of problems, including tests.
* Much more user-friendly output.
Better bad version output
Run tests in parallel (#4)
Some corrections upstream
Library updates
README-Debian
Elaborated on Debian installation instructions
Create a Debian build script
Temporary Hashable upper bound (#21)
Added Vincent's packages
Added quickstart
hashable 1.2 again (fixes #21)
Add a few more packages for Michael
Default build flags available
Cleaned up warnings
--only-permissive and --allow
add a bunch of my packages
Updated debian bootstrap
Fix a stupid mistake