added shared dnfpluginscore lib
make plugins use shared lib
added translation wrappers
added missing usage & summary
PEP8 fixes
Added CMake files
Added CMake build to .spec & and added translation files handling
Added translation .pot file
Added da translation files so we have something to build & install
tests: use cli logger in kickstart test
Added transifex config
make .spec use gitrev in the source file
add helper script for building source archive