bugfix: rename readings entry as well (in -> pins)
bugfix: assemble state string correctly for dimmer device

The bugfix in commit id 30bd0677224 only fixes the state string creation for
the power switch, but breaks it for the dimmer.

The define statement for the dimmer is different from the power switch
because the state string also contains the brightness (e.g. "on B: 100")

Use define SHC_DIM_60_notify_on notify SHC_DIM_60:on.B:.100
rename packet_layout.xml to SHC_packet_layout.xml
update html documentation

by running "perl contrib/commandref_join.pl" the commandref can be refreshed and
verified.
extend workaround to correct wrong readings entries

Before the workaround was only applied to barometric_pressure. Now all
other affected readings are cleaned up as well.
Merge pull request #77 from Roadyweb/fhem_update

Fhem update