Organised the base project

[kinggoesgaming]

This PR looks huge. That's just cuz i added MIT license to all the java files... If you want another license just let me know and i will switch it over...

• [x] improved the .gitignore. It now covers all the IDEs
• [x] added MIT license. you can now run gradle licenseFormat to automtically add licenses.
• [x] made README.txt into README.md and add a butt ton of detail into it.
• [x] compressed a lot of imports in EssentialCmds into wildstar (*) imports
• [x] @Plugin now gets its info from a separate class
• [x] improved build.gradle. also added some other files connected with gradle
• [x] rest is just license addition stuff

[hsyyid]

Woah. Nice job! Thanks for cleaning everything up, reviewing it now.