Updates idDHT11.cpp to differentiate between timeouts

Creates three different error codes instead of a single code for three timeout possibilities.
Updates idDHT11.h to differentiate between timeouts

Creates three different error codes instead of a single code for three timeout possibilities.
Adds timeout error messages for each new error code
Adds timeout error messages for each new error code
Adds more time to acquire data

Example code consistently times out while grabbing data.  Increasing the delta range for data acquisition fixes this.
Merge pull request #1 from WurdahMekanik/master

Adds error codes to differentiate between timeout possibilities, fixes delta range for data acquisition, and updates example code.