add dependencies for sqlite on <2.5 (or maybe <2.6?)

[dustin]

We require sqlite, which is bundled with 2.5 and available externally.

We also require simplejson, of which apparently a version is bundled in 2.6.

These should both be expressed somehow in the setup.py file's dependencies.

exarkun points to:

 http://divmod.org/trac/ticket/1918

which suggests that depending on the bundled sqlite in 2.5 is a bad idea?

[dustin]

OK, completed in

commit 2bef2d8034519bc84789353e0b20f43e5cd3de50
Author: Dustin J. Mitchell <dustin@zmanda.com>
Date:   Mon Feb 15 13:45:17 2010 -0600

    require pysqlite on py-2.5 and lower, use it in buildbot.db
    
    This adds a method that determines the appropriate module to use for
    sqlite, and special-cases the dbapiName 'sqlite3' to point to this
    module name