made methodsCsv and fieldsCsv consistent, ignored additional idea files

Tiny change, but lays the ground for something I've been fiddling with lately. I've been able to use my own `methods.csv` and `fields.csv` files in the remapping srg names to mcp names, yielding a more understandable set of source code without having to wait on the files on [MCPTest](http://mcpold.ocean-labs.de/files/mcptest/) to be incorporated into userdev.