OnCatch & tranformChance spec

This spec allow you to make a pokemon transform into another pokemon, with a % of chance
The player will be notified on catch, in the chat message.

List of spec	Example	More info
oncatch	/pokespawn Squirtle onCatch:Ditto	When a player will capture this Squirtle, it will transform into Ditto.
transformChance	transformChance:50	Used with the spec above, the chance to transform will be of 50%

You can use onCatch:random to make a transform into a random pokemon !

NEW!
Now you can use theses command to create custom preset spec :

/catchspec register <key> <specs...>
/catchspec unregister <key>
/catchspec info <key>
/catchspec list

There is some new examples :

1. /catchspec register MyTest Lugia s
2. /catchspec register MyTest2 ub

Example	Command	More info
1	/pokespawn Squirtle onCatch:MyTest	When a player will capture this Squirtle, it will transform into Lugia Shiny.
2	/pokespawn Squirtle onCatch:MyTest2	When a player will capture this Squirtle, it will transform into a random ultrabeast.