Removed method hooks, instead put the dependent method names to be
picked up from the attributes
Add ontology_namespace method in the loader. It uses the ontology
idspace in case default namespace is not set
persist new comments for SQLite backend
refactored all sql to a separate lib file
Fixed issue with synonym column and reporting of loader
added support for updating comments(broken though) and loading of sqllib
Updating comments works for sqlite backend
Caching of existing cvterms is now done before it is updated
The update step reuses the existing cvterm  table
Merge branch 'refactor/sql-handling' into tmprebase