added automatic request parameter binding on OCommandExecutor

when configuring a command you can define a pattern like "GET|commandUrl/{paramOne}/{paramTwo}" and the strings between brackets will be bound to request paramenters.
Ex. orientdb-server-config.xml 

<command implementation="org.test.OServerCommandHelloWorld" pattern="GET|say/hello/to/{name}/{surname}">
</command>

you can call it with 

http://<address>/say/hello/to/john/doe

and in your command you will find the request parameters "name" = "john" and "surname" = "doe"