Define arbitrary number of expressions of your own.

How to use:
1. Open Settings in "Account Settings > Plugins > User-defined Expressions (Gear icon)".
2. Fill "Expressions" with whatever you like, in the format of "fromString=toString", separated by "@@".

Please set "ExpressionDelimiter" explicitly if you prefer a delimiter other than "@@".

Known limitations:
- No dynamic expressions (such as {today}) can be made.
- Expressions containing "=" in fromString cannot be defined.
- Cannot define more than 100 expressions (if you'd really like to do, please modify the value of MAX_NUMBER_OF_EXPRESSIONS in the code).