Fixes https://pagure.io/copr/copr/issue/67 copr edit-package-tito nulls out fields not edited.

copr-cli:

• when building module --url or --yaml needs to be selected
• remove make-module command
• update man for build-module command
• allow to submit optional params to mbs
• frontend act as a gateway between user and mbs
• possibility to submit yaml file to mbs
• compose auth url more prettier
• describe module actions in man
• rename method for making module to match cli naming
• split module building into two separate commands
• add possibility to build module via MBS or not
• add command for building modules
• more similar mock-config with real builder's config
• put errors/warnings on stderr
• fix trace in 'copr-cli --debug'
• replace fedorahosted links
• use 'avg' api from python-progress

python-copr:

• allow to submit optional params to mbs
• frontend act as a gateway between user and mbs
• allow to create module and it's action separately
• possibility to submit yaml file to mbs
• update auth for current MBS package
• rename method for making module to match cli naming
• add command for building modules
• files can be uploaded via simple MultipartEncoder (RhBug: 1440480)
• fix proxyuser when creating modules
• replace fedorahosted links
• fix setting username on multipart data
• proxyuser feature (RhBug: 1381574)

EPEL6 fix