Bukkit

Completed join firework and firework macro command (/fireworksex <style>), optimized code

Commits:
Filling README
Use Bukkit scheduler instead of thread, login-firework delay is in ticks now
Added CI to pom
Preparing config for customisable rockets
Renaming FireworkManager to FireworkHandler
Improving documentation (updated config.yml, added Main.md)
Added "disclaimer for development builds" to documentation
Check for op at /fwltest command (will get permissions later)
Added abstraction model "FireworkStyle" for firework effects
Adding defaults to config.yml
Outsourcing to FireworkManager and adding getColor(String colorname) function
Added FireworkEffect-obtainer, removed debug-code
Renaming /fwltest to /fireworksex (aliases: fwex, fw, firework)
Added permissions to config.yml, (finally) updated config.yml version to 0.2
Completed firework macro command (/fireworksex <style>) and optimized structure
Outsourcing join delay interface and moving it with FireworkStyle to package Model
Add docs/desc with a short description. Applied best practice: Newline at file end
Release build 0.3, minor changes to README

• Help is missing
• Permissions checks are missing