Added urlserver CLI script and tog script.

- urlserver CLI script is used to add urls/messages to the WeeChat urlserver.py script's database.
- tog script looks up if NSB.no trains are still on time and displays their departure times.
weather: CLI Wrapper scripts for the barometer Ruby gem.
age: CLI script that returns your age (as configured in the script) or the age of someone else (by passing their date of birth as CLI arguments).
checksums: CLI Ruby script that returns various checksum (MD5, SHAsum, SHA1sum, sha512sum)
convert_units: CLI Ruby script that converts various temperature and other units.

Makes use of ruby-units gem for any non-Fahrenheit conversion.
fliptext: CLI ruby script which converts your text into Unicode glyphs that makes your text look like it's upsidedown.

Based on the javascript code from http://www.revfad.com/flip.html
mathtext: CLI Ruby script that converts your text into Unicode glyphs from the bold, bold-italic, script, script-italic, fraktur or fraktur-bold mathematical character ranges.
Changed the keynames slightly so they follow the same format.
find_larger_than: Bash CLI script that helps you find the large files that are hogging your disk space.