Issue3 (#5)

* add tests for argparser to check valid invalid input of specified ports flag
* multiple hosts support
* Consolidate specifiedports and portrange flags
* update reporting
* refactor to optimally parse hosts and ports
* implement CIDR block notation feature
* support for output to a file as txt or json
* added tests for protocol support
* add ssh tunneling package
* implemented scanning from a jump box
* update documentation