Experimental IPv6 support

Added experimental IPv6 support. I'm not an expert in IPv6, so I would appreciate some beta testers.

0.36

Packaging changes: remove .sh extension from init script, use 'tar' for final packing step.

0.35

Add deb package, roll up changes.

Warnings:

• renamed wrtbwmon.sh to wrtbwmon
• added init script and cron entries

check your configurations!

0.34

update version

0.33

Merge remote-tracking branch 'github/master'

0.32

update version

0.31

oops

0.3

• transition from invocation as "wrtbwmon" to "wrtbwmon.sh"
• update readme
• add ipk
• install files according a standard filesystem layout
• remove peak/offpeak distinction
• add init script
• perform reverse DNS lookups to find hostnames
• fix locking issues
• add "dump" option

0.2

reorder unlock, update

2015-03-29

0.1

update README