statsd.upstart: exec to remove parent shell from process list

Changes ps output from:

1234 _statsd sh
1235 _statsd \_ statsd /etc/statsd/localConfig.js

to just one second line without intermediate shell process waiting for node.
Merge pull request #429 from temoto/patch-1

statsd.upstart: exec to remove parent shell from process list
Refactorize backend interface
Add fake graphite server for utility
Use new interface in repeater backend
Avoid global variables
Avoid global variables
Fix prefixStast
Use ' instead of "
First wrapping to object
Avoid global variables
jshint fixes
Refatorize read config

Use method as callback in readConfigFile
Use method ad callback in onUdpPacketReceived
Use method as callback in onTcpConnectionActive
Use method as callback in onTcpPacketReceived
Use method as callback in onFlushInterval
Remove logger as global variable
Reformatting with space and without laxcomma
Export Statsd and run it only if call directly
Remove unused variable and use function to cleanup