drop support for Python 2.5
set version to 1.1dev
pep8 fixes
use as-syntax in except clauses #38
testrunner.py: fix syntax on py3
fix spurious failures in test__socket_dns6.py
replace "ex = sys.exc_info()[1]" with "as ex" #38
select: remove unused import
fileobject.py: remove unused import
test__issue302monkey.py: remove unused import
pyflakes fixes
WIP new 'make travis'

- install cython from ppa
- add python 3.3
- do not install web.py on 3.3
- run linters first to abort broken builds early
- do not test psycopg2_pool.py

new make commands:
 - make whitespace
 - make pep8
 - make pyflakes
 - make lint    # runs all of the above
 - make travis  # runs on travis