* Modified owned planet view to include a field which indicates whether
mining settings are specific to the planet or come from the empire;
modified "simple" game components accordingly
* Modified stored procedures to only allow planet-specific mining
settings updates when the planet actually uses planet-specific settings,
and added a stored procedure which toggles the source of a planet's
settings
* Added corresponding parts to mining settings DAO and resources
controller
* Added session commands and server command handlers that toggle the
source of the settings and that upload the settings
* Split planet page template into multiple files for clarity and added
the mining priorities form to the natural resources tab
* 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.
