invenio2-kickstart: customization for zenodo

* Specifies the name of the CFG_INVENIO2_REPOSITORY_GENERAL directory

* Checks for bower-base.json existence
I see.  However using repository name "invenio-op" while keeping package name "invenio" does not seem to be best to me; it kind of looses consistency.  Why not keeping the repository name and the package name equal and only playing with branch names?