pushover.pl 0.6

* option "blacklist" takes either full or short buffer names
* display full buffer name in notifications
* support using multiple notification services simultaneously
* add option "only_if_inactive"
* restrict hook_print to tags "notify_message,notify_private,notify_highlight"
Merge pull request #7 from stfnm/pushover.pl

pushover.pl 0.6
New script countdown.rb: display a countdown on current buffer
weetweet.py 1.2: update to twitter lib 1.14.1
weetweet.py 1.2.1: fix stream bug
kickban.pl 0.3: fix bug with uninitialized variable
New script btc_ticker.py: display Bitcoin or other crypto currency spot exchange value
Add format of messages for commits in Contributing.asciidoc
colorize_lines.pl 3.3: use localvar "colorize_lines" for buffer related color
New script mnick.pl: multi-server nick changer