Add bastion host capability#39

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taterhead wants to merge 11 commits intocloudtools:masterfrom

taterhead:small-fixes

Commits on Apr 4, 2019

working first pass at using an ssh tunnel to CA server. still need to make the tunnel configurable
taterhead
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Commits on Apr 7, 2019

more work on making ssh tunnel work
taterhead
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Commits on Apr 9, 2019

all working with ssh tunnel, I think
taterhead
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Commits on Apr 10, 2019

went down to a single config file
taterhead
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Commits on Apr 11, 2019

add option to not automatically download cert
taterhead
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