Add memwatch installation shell script
clean up
Clean a bit up
Add v0.5.0 changelog
Bump version, v0.5.0
Start development on v0.5.1
Update README.md

Typo
var geoip = require('geoip');
Use boolean evaluation
Merge branch 'master' of github.com:kuno/GeoIP
Clean up for NULL
Update libgeoip to 1.6.0