HMConfig: improve EM-8

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6811 2b470e98-0d58-463d-a4d8-8e2adae1ed80
01_FHEMWEB.pm: enable negative slider values


git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6812 2b470e98-0d58-463d-a4d8-8e2adae1ed80
HMConfig: improve EM-8

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6813 2b470e98-0d58-463d-a4d8-8e2adae1ed80
98_CustomReadings.pm: added CustomReadings_GetHTML (see commandref)

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6814 2b470e98-0d58-463d-a4d8-8e2adae1ed80
37_harmony.pm: added new module


git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6815 2b470e98-0d58-463d-a4d8-8e2adae1ed80
37_harmony.pm: added media keys


git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6816 2b470e98-0d58-463d-a4d8-8e2adae1ed80