Add --any option to ssh command

[DavidWittman]

Sometimes I just want to connect to any server matching a particular
Name tag. The --any flag supports this behavior by selecting the
first running instance in the list of instances and connecting to it.

[coveralls]

Pull Request Test Coverage Report for Build 1350

• 1 of 5 (20.0%) changed or added relevant lines in 1 file are covered.
• 14 unchanged lines in 2 files lost coverage.
• Overall coverage remained the same at 34.419%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
commands/ssh.go	1	5	20.0%

Files with Coverage Reduction	New Missed Lines	%
aws/fetch/s3_helpers.go	2	74.85%
aws/fetch/manual_fetchers.go	12	73.6%

Totals
Change from base Build 1345:	0.0%
Covered Lines:	13184
Relevant Lines:	38304

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💛 - Coveralls

[simcap]

Thanks for the PR and the work, but unfortunately this project is (so far) not maintained anymore. So it is unlikely this will ever get merged.