Fully Featured EMC & Knowledge Subcommands

[DonovanDMC]

/projecte emc

• add, adds emc - removes if less than zero
• remove, removes emc - adds if less than zero
• set, sets emc
• get, gets emc
• test - tests if an amount can be removed from the player's emc

/projecte knowlege

• clear, clears knowledge (slightly different from /projecte clearknowlege, it returns a fail response if they have no knowledge)
• learn, adds the specified item to their knowledge, if not already learned
• unlearn, removes the specified item fro their knowledge, if learned
• test, tests if the user has the specified item in their knowledge

This is based on the /emc and /knowledge commands from Project Expansion. I've slightly modified them to better fit ProjectE. Primary differences:

• Not differentiating between executing actions on other users and the executor
• Not attempting to send notifications

I couldn't actually find the datagen task (I didn't really try that hard), so I'm unsure if I've actually added all that was needed (I've just added the strings to the en_us lang manually)

[pupnewfster]

Datagen task should just be runData. Which will also update the caches so that files don't have to be generated for other people who are running it in the future if nothing changes. It also updates en_ud automatically by running the datagen.

[James103]

This should fix https://github.com/sinkillerj/ProjectE/issues/2024, as far as I can tell.

Also, will you please make sure that all instances of the term EMC are capitalized in the strings you add? Make sure to do this both in the generated lang file as well as the file that generates the lang file, and/or make sure to run the datagen task after changing the files. The rest of the strings have the EMC term capitalized.