ObjectiveFunction can almost be built
ObjectiveFunction can almost be built

- ObjectiveFunction now builds with general "objectives" and "constraints"
- It stole code from LinearEqualityConstraint and BoundaryCondition to now handle linear constraints internally
- Added objectives for applying fixed-boundary LCFS constraints
- Still need to work out some bugs, but want to commit in case I lose power during this storm

PlasmaControl/DESC,PlasmaControl/DESC