Added PetitionPlugin

Features:

• Players may open one or more petitions and get assigned a unique ticket # for each. This number can be used to track the petition until it has been closed.
• Each petition may be assigned to a specific mod/admin or left as unassigned.
• Players as well as mods/admins may add comments to an open petition.
• mods/admins (and currently players) may warp to the location where the petition was opened.
• mods/admins (and currently players) may review the history of each open petition.
• Closed petitions are archived and can be reviewed or reopened by moderators.
• Use the command "/petition" or the shorthand command "/pe". 
• All commands are case-insensitive.
• New and updated petitions are announced to everyone.
• Supports multiple worlds.
• Offline players receive notifications on petition updates when logging in.
• Players and moderators are reminded of their open petitions at configurable intervals.

Commands:

/pe open or /pe create or /pe new
Syntax: /pe open|create|new <Message>

Example: /pe open there a floating tree at the spawn

to create a new petition.

/pe comment or /pe log

Syntax: /pe comment|log <#> <Message>

Example: /pe comment 1 the tree is still floating

to comment on the specified petition for any progress.

/pe close

Syntax: /pe close <#> <Message>

Example: /pe close 1 floating tree fixed

to close a petition when and if it is solved.

/pe list

Syntax: /pe list <count>

Example: /pe list or  /pe list 1

to view the list of petitions with list page number.

/pe view

Syntax: /pe view <#>

Example: /pe view 1

to view the specified petition.

/pe assign

Syntax: /pe assign <#> <Operator>

Example: /pe assign 1 fearthegame

to assign the specified petition to an operator.

/pe unassign

Syntax: /pe unassign <#>

Example: /pe unassign 1

to unassign the specified petition.

/pe warp or /pe goto

Syntax: /pe warp|goto <#>

Example: /pe warp 1

to teleport to the coordinates where the petition was created for inspection.

/pe reopen

Syntax: /pe reopen <#> <Message>

Example: /pe reopen 1 the floating tree was not fixed properly

to reopen a previously closed petition for any new concerned issues.