Parkour-SNAPSHOT.570: Added "%parkour_player_course_completed_(course)%" placeholder

Added "%parkour_course_joinfee_(course)%" placeholder
Added "%parkour_course_ecoreward_(course)%" placeholder
Added "%parkour_course_players_(course)%" placeholder
Added "%parkour_course_playerlist_(course)%" placeholder
Added ability for commands to be run from Player starting with prefix "player:"
Began work on placeholder json for use on docs
Improvement to reset deaths when "OnDie.ResetTimeWithNoCheckpoint" is set

Parkour-SNAPSHOT.568: Added optional Maximum ParkourLevel

Added "addlevel" to "setplayer" command
Added "ParkourTool.Restart.SecondCooldown" for Restart tool countdown
Corrected docs

Parkour-SNAPSHOT.566

Update changelogs

Parkour-SNAPSHOT.564: Include a few more Course details

Checkstyle fixes

Parkour-SNAPSHOT.562: Merge pull request #274 from steve4744/master

Allow translated message strings to be empty

Parkour-SNAPSHOT.558

#273 - Corrected import to support 1.8

Parkour-SNAPSHOT.555: #270 - Allow for each course to be "resumable".

Fix OnJoin with existing session
Changed "OnJoin.Item" to be "ParkourTool." in the config.yml
Fixed NORUN ParkourMode
Fix HideAll toggle
Fix NPE on server restart

Parkour-SNAPSHOT.553: Merge pull request #269 from steve4744/master

Add 'remaining deaths' placeholder and as a scoreboard option

Parkour-SNAPSHOT.549

Update Challenge docs

Parkour-SNAPSHOT.546: Merge pull request #267 from steve4744/master

prevent npe if scoreboard is removed by another plugin