Initial redmine support

- fetch all bugs
- fetch individual issues
- list all available projects

A small test program is included

Signed-off-by: Petter Mabäcker <petter@technux.se>
redmine_interface.py: Fix product_id problem

product_id must be set to a integer and not a string. The pyredmine
manual indicates that strings can be used, but that doesn't seems to
work.

Also fix IndexError when trying to see bugs in a specific redmine
project.

Signed-off-by: Petter Mabäcker <petter@technux.se>
ircbot.py: Fix redmine usage text

irc has problems to display newline in printouts. Instead make sure to
print each newline in text as a separate irc message.

Also fix some pep8 warnings.
Signed-off-by: Petter Mabäcker <petter@technux.se>