Added BANG message support to object MessageAdd, MessageSubtract,
	  MessageMultiply, MessageDivide and MessagePow so they have the
	  same behaviour that the pure-data ones

Fixed MessagePow returning wrong values for a power <= to 0
Fixed PdGraph::addConnectionToObjectFromOutlet getting the MessageOutlet
using the inlet index instead of the outlet index
Fixed PdFileParser creating MessageText objects with the wrong init
message
Fixed message random generating overflowed values when range < 1
Change mathematical functions
Make MessageRandom max_inc computation in one line
Use the same message for MessageText creation than for any other object creation
Add EOF new line and moved the toString function
Merge pull request #41 from Kyew/master

Fixed some object having different behaviour than the pure-data ones and fixed some bugs