Full refactoring of plugin

Hello!

We rewrote "nagios_erlang.erl" in order to be able to send multiple applications with commas. Since one has to edit too much.

We also added a flag - host, which replaces the hostname of the node from which the works Nagios (TMP_NODE). And added to the node name is a $ RANDOM, to erl does not conflict with a simultaneous check Nagios.