Add meta/properties image methods, whip compute
Refs: #4231
New methods:/image meta list/set/delete --<meta>[=value] ... -p k1[=v1] [-p k2[=v2]] ...
Add --property to image list
Refs: #4220
Also, fix various bugs introduced by utils re-writtings
Test ArgumentParseManager.parse
Test ArgumentParseManager.update_arguments
Refs: #4058
Missing test: ArgumentParseManager.parse
Fix intetation mistake
Allow non-None empty default values in Args
Test ArgumentParseManager upto update_parser
Test ProgressBarArgument
Fix typo in error docs
Test Version and KeyValue Arguments
View revisions
Also available in: Atom