Create initial Maven project for mcparkour
Added commands to manage course teleports

I have also added i18n support. Teleports are stored in a SQLite
database file.
Add start/end signs, XP timer

This adds the framework for sign checking and player tracking while
playing a course.
Add teleport signs
Teleport players back if they hit the bottom

The player's timer continues to run.
Handle players leaving a course in play

If a player leaves a course in play, through teleport or disconnect,
they will be teleported to their world's spawn.
Prevent players from taking damage in courses
Remove speed modifier effects from course players
Add walk-on teleport signs, reset timer on fall
Prevent sign creation by permission
Added messages on teleport and on end
Remove teleport at course end
Show progress every tick via the XP bar
Add MySQL & high score support
Prevent teleporting to spawn when hitting bedrock
Check worlds before comparing distance
Update ParkourListener.java

extended the sign detector to 4 blocks
Add support for checking blocks 2-5m down
Add more messages + high score broadcast
Fix order of returned results from high scores