- remove access to dependency offsets again, add add_provides... methods to add a single dependency
- remove access to dependency offsets again, add add_provides... methods to add a single dependency

JacksonIsaac/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,JacksonIsaac/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,jsilhan/libsolv,jsilhan/libsolv