Standard Costs Setup and Early Late Registration Setup screens added.

Child Discount Setup screen started.
EarlyLateRegistrationSetup screen

Conference info appears in Navigation Panel

ConferenceFindForm improved - column names fixed, add conference functionality added
Delete button for ConferenceFindForm started but not completed
Merge and uncrustify.
merge from lp:~peter-simpson/openpetraorg/dev_0001526_Conference_Standard_Costs
merge from lp:openpetraorg