Integrate c3p0 database library
Merge pull request #911 from jon-stumpf/enhancement-update-tools

Update scripts in tools
Merge pull request #913 from jon-stumpf/enhancement-log-level

Add logger.level capability
Refactored NamedParameterStatement to manage connections and prepared statements all by itself
Merge pull request #875 from vitalidze/master

Database code refactoring
Merge branch 'master' of github.com:tananaev/traccar