updated target model
named target serializability
removed CoordinatesEpoch and unimplemented stubs, updated TODOs
Revert "REL-1914: Added flip transformation to GMOS OIWFS when using AO." because of requirements change.

This reverts commit 453034f51a25a99378b45175d0fd005ec5b9eb60.
Merge pull request #125 from jluhrs/feature/REL-1914-2

Revert "REL-1914: Added flip transformation to GMOS OIWFS when using AO....
removed unused DegDegTarget
Merge pull request #126 from tpolecat/degdegtarget

OCSADV-154 Remove DegDegTarget
Merge pull request #124 from tpolecat/target-model

OCSADV-154 core target model updates
restored overwritten changes from #51
Merge pull request #128 from tpolecat/flori-fix

OCSADV-154 restored overwritten changes from #51(REL-2015)