Release v0.3 for krep (2018-07-24)

It included the changes on tag CM-0.3 except the improvements and bugfixes on this branch:

Improvements:

git: Support option --skip-validation
pki: Optimize the sub-command options
pki: Optimize the hehaviour with local update (--offsite and --local)
pki: Support variable escape and \n with the mesage from command line option
pki: Don't prompt package pattern option with conditions
repo: Optimize to use one gerrit instance to communicate with Gerrit server
repo: Support to provide the XML file from option
repo: Support to generate XML file or mapping file after repository location mapping
repo: Support extra-options for repo init and repo create
repo: Support to count the output project number
repo: Support option --skip-validation

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