[OPTI] No need of a lock in the class. Already using Concurrent
Collection.
[MOD] Add a configurable delay for Execution of PST. See #347
[MOD] Some cut in the Time Method in the Util class. See #348
[FIX] Minor fix. See #347
[MOD] Adding possibility to return to normal time. See #348
[ADD] Adding the command /pt to change the time of the player with the
possibility to fix it and to return to normal. Fixes #348
[FIX] inverted logic for relative. See #348
[MOD] Only put the time as fixed for the wanted player, just have to use
normal to come back to world time. See #348