WriteDelimitedFile needs to support multiple irregular time series

[smalers]

Data collection systems often have multiple parallel irregular time series, for example stage and discharge. However, the current WriteDelimitedFile command does not allow writing multiple irregular time series. The WriteDateValue command needs to handle similar to how the irregular table display works. Options that may be configured via parameters include:

1) Default to only output date/time from the first time series - this should satisfy the short-term need 2) More advanced - allow all irregular date/times to be output, resulting in blanks in cells where there was no value for a time series

[smalers]

Now is not a good time to do this integration given the need to migrate all the code to open source licensing. Attached is the source file that was changed. This can be addressed later when there is time.

Attach file here.
WriteDelimitedFile_Command.java.txt