* Modified mining settings stored procedures to use text identifiers
instead of numeric identifiers
* Added DAO for mining settings and controller for resource operations
* Added UpdateEmpireMiningSettingsCommand and associated command
delegate. The command always returns NullResponse.
* Overview page templates split into multiple files for clarity, added
priority update form to the empire economy view and associated web
server handler
* Regrouped component definitions into one single file per package in
most cases, with a few exceptions
* Added documentation about how the configuration is stored and which
guidelines should be followed when adding or modifying Spring component
configurations.
