Gemfile: ruby-graphviz now dependency of ConceptQL gem
Gemfile: add ruby-oci8 for Oracle support
conceptql_sandbox: pass params[:dialect] to Example
database.yml.example: update example for Oracle support
Example: update to take and pass dialect all around
index.haml/app.js: overhaul to support multiple dialects
precache: update to precache oracle and postgres dialects
CHANGELOG: update for 0.0.4
Gemfile: bump ConceptQL to 0.0.8