improved error handling for CGI/FastCGI

our own CGI error handler

cache version across calls to version_mercurial, so as to avoid opening the repo every time

rename config.PREF_TIMEZONE_FALLBACK, add Cookie expire/path info, and move the hg version stuff into the template/helpers

remove debug crap and fix Timezone.is_default to detect config.PREF_TIMEZONE_DEFAULT as well

Autodetect user timezone using Javascript, this makes the Preferences code a bit more complicated in terms of interaction between default/parse/is_default/build/process/etc, but it should work as intended now

fix config.VERSION_LINK to use relpath('.')

improve LogSearchIndex error handling, add explicit close() method, and modify get_index to not keep the index open persistently

simple FastCGI support

modify index.cgi to use qmsk.web.cgi_main

remove support for default font, as it doesn't support unicode, and implement a 1px line spacing for format_png

fix calls to format_rss/format_png to use a keyword argument

merge quickfixes

some quickfixes to fix deployment errors

tag version 0.1.0-rc1

add version string

implement some basic search-targets for message and nickname

revert to use %Y-%m-%d for URL dates again

fix wrong timezone for channel_date

have dates in URLs be partial timestamps - fix datetime-timezone-comparison mess

center calendar list, add prev/next date to channel_link, add view-last-x-lines form to channel_last/channel

add <form> for month/year to calendar header

add three calendars to the channel_calendar view

implement prev/next_date in LogSource

make IrssiParser a bit more resilient as to whitespace in/after timestamps

fix handling of custom types by parser/formatter

split out helpers._render_type, and add support for ?type= to various other handlers... still needs more work, though

add prev/next date links to channel_date pagination

reformat add_option's and rename --after -> --from, and make that and --until inclusive

implement our own optparse.Option with date/timezone types