Updates chat/weechat to 1.0

New major features in this release:
- plugin "trigger": Swiss Army knife for WeeChat (replaces "rmodifier" plugin)
- plugin "exec": execute external commands (replaces script "shell.py")
- bare display: easy click on long URLs and text selection with mouse
- support of environment variables in /set command
- hidden buffers
- negated tags in filters
- toggle of filters in specific buffers
- flexible conditions for adding/removing buffers in hotlist
- text search in buffers with free content
- support of wildcard "*" inside masks
- support of nested variables in evaluated expressions
- tag with host in IRC messages displayed
- support of "away-notify" IRC capability
- IRC commands: /allpv, /remove, /unquiet
- bar items: buffer_short_name, irc_nick_modes
Updated chat/weechat to 1.0
+ ffmpeg1-1.2.8, glpk-4.55, libxkbcommon-0.4.3, nspr-4.10.7,
  nss-3.17, poppler-0.26.4, poppler-data-0.4.7, py-cryptography-0.5.4,
  py-requests-2.3.0, py-simplejson-3.6.3, rftg-0.9.4, x264-devel-20140823.
Add QTDIR to CMAKE_PREFIX_PATH, so CMAKE finds qt5 when this bl3.mk is
included.
Reduce diff to upstream; install more files.
Bump PKGREVISION.