[Proposal]: Combine readName vs writeName for a dataset field

[stephprince]

In #190, the DEFINE_DATASET_FIELD macro creates a readName and writeName to access the data for read or write. In theory these fields could be combined so the same name could be used to access the data.

Note the behavior of accessing a writeName field when in read-only mode is also not currently clear and may need to be further documented or tested.

[oruebel]

Just for added detail, combining the readName and writeName functions would require merging the BaseRecordingData and ReadDataWrapper classes to have a single wrapper class for reading and writing datasets and attributes.