[SchemaManager] Rename getTableColumns to getColumns
[SchemaManager] Rename getTablePrimaryKey to getPrimaryKey
[SchemaManager] Rename getTableForeignKeys to getForeignKeys
[SchemaManager] Rename getTableIndexes to getIndexes
[SchemaManager] Rename getTableChecks to getChecks
[SchemaManager] Rename all getGenericTable* to getGeneric*
Merge pull request #63 from egeloen/f-schema-manager

Rationalize schema manager naming