Packaged gem dependencies

This will allow different systems to run all necessary rake tasks under
"bundle exec" without explicitly installing gems; instead, the packaged
gems will be used.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated db filename to include .db extension

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
DatabaseHelper now performs schema insertion logging

After the application of each changescript to the db, a schema insertion
op will occur logging information regarding the application of the
changescript.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>