charcoal-core 0.3

Major rewrite of query expressions (Filter, Order, Pagination); minor improvements for datasource repositories and data models.

Highlights:

• Added AbstractExpression and ExpressionInterface as new foundation for Filter, Order, and Pagination
• Added Expression to be a dedicated class for raw SQL expressions (extended by Filter and Order)
• Added Expression Field trait and interface to unify "table" and "property" options for Filter and Order expressions
• Added DatabaseExpressionInterface as foundation for DatabaseFilter, DatabaseOrder, and DatabasePagination
• Added Filter Collection trait and interface for grouping Filter expressions (used by AbstractSource and Filter for nesting expressions)
• Added Order Collection trait and interface for grouping Order expressions (used by AbstractSource)
• Improved decision tree when compiling SQL for DatabaseFilter and DatabaseOrder
• Added support for serializing expressions
• Added support for named expressions
• Added "direction" option to Order
• Refactored unit tests and improved coverage for Charcoal\Source
• Improved AbstractModel and StorableTrait to be leaner, less overriding
• Cleanup DocBlocks for various classes

Warnings:

• Filter
  • Deprecated string option in favour of condition
  • Deprecated table_name option in favour of table
  • Deprecated val option in favour of value
  • Removed DEFAULT_FUNC class constant
  • Moved DEFAULT_TABLE_NAME class constant to DatabaseSource::DEFAULT_TABLE_ALIAS
• Order
  • Deprecated string option in favour of condition
  • Deprecated table_name option in favour of table
• Pagination
  • Renamed DEFAULT_NUM_PER_PAGE class constant with DEFAULT_COUNT
• DatabaseSource
  • Renamed DEFAULT_DB_TYPE class constant to MYSQL_DRIVER_NAME