fhem: add digital inputs to fhem device readings
correctly support set commands

The fhem web interface now shows the correct set commands
according to the device type
implement get commands for EnvSenor inputs
rename in -> pin, port -> pin
remove useless info in SHC_Dev->internals (PaketCounter and MsgData)
review 37_SHC.pm and remove dead code
add GPL license info
remove copy & paste remains in svn id info
bugfix: notify doesnt work
Merge pull request #76 from Roadyweb/fhem_update

Fhem update