Ability to import custom signals via a CSV file

[TradingDominion]

It would be useful to be able to import a signals CSV file.
The first column would contain the date, and the subsequent columns would have the heading as the signal variable name and the column contents would contain the numerical signals.

Sample CSV file contents:

Date, Signal1, Signal2
2022-01-01, 1, 0
2022-01-02, -1, 1
2022-01-03, -1, -1

We could then reference these signals from the entry or exit conditions for each trade.
ExitCondition = Signal1 > 0

[tibkiss]

This has been completed with Version 2.6.0, released at 2023-03-30