Implement waitingfor

[santiagocanti]

Added the option -waitingFor which is going to show only the hosts waitforit is waiting for.

The debug option was too much verbose and I found this solution to be a middle ground between having no information at all or having too much.

It looks like this:

I'm new to go so if there is something horrible done, please forgive me :)
Also, I tried running the tests for quite a while (running inside a docker container) but wasn't able to, not sure if I could get some help with that.

Thanks for this awesome utility!

[coveralls]

Pull Request Test Coverage Report for Build 58

• 38 of 69 (55.07%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.6%) to 48.529%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
main.go	0	2	0.0%
network.go	38	67	56.72%

Files with Coverage Reduction	New Missed Lines	%
network.go	1	75.61%

Totals
Change from base Build 54:	-0.6%
Covered Lines:	132
Relevant Lines:	272

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💛 - Coveralls

[maxclaus]

hey @santiagocanti great idea. I will review it once I have some free time.
Thanks!!