version: Fix code review issues

Change-Id: 5521f0add2
repo: Make git version check more robust

Change-Id: fc4f7f7408
jira/client: Change JIRA base URL config handling

Right now the URL path of 'api/2/' is hard-coded in modules/jira/client. This
patch makes the whole path configurable. That means that the full path must be
specified in the config file and the library itself is not appending 'api/2/'
any more.

Change-Id: ac5c4243f3
Implement a new command: version

This new command just prints salsaflow version and exits.

Change-Id: ea29de505a
Add CircleCI support

Change-Id: c14edc6c98
Story-Id: SF-29
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Change-Id: 2f9373d8c4
Story-Id: SF-25
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Change-Id: e049bfe945
Story-Id: SF-25
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Change-Id: 80d2c53e6e
Story-Id: SF-25
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Change-Id: 0feb5edfee
Story-Id: SF-25
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Change-Id: bb7a0216b1
Story-Id: SF-25
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Change-Id: 96dd1911a2
Story-Id: SF-25
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Change-Id: 0738fd43be
Story-Id: SF-25
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Change-Id: 6ba441faef
Story-Id: SF-25
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Change-Id: be57619dc7
Story-Id: SF-25
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Change-Id: c86552b951
Story-Id: SF-25
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Change-Id: 625113c337
Story-Id: SF-25
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Change-Id: 76b3287f00
Story-Id: SF-25
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Change-Id: 5e80942605
Story-Id: SF-25
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Change-Id: 0c730c5868
Story-Id: SF-25
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Change-Id: 0d1db680a8
Story-Id: SF-25