Support for custom and special characters

- remove fixed replacements like ä => ae
- add attr replaceRegex for replacements needed by the used display
- add attr customChar0-7 for custom chars
- replace \x{XY} with char XY to access non ASCII and custom chars
I2C_LCD: replace unicode-chars by corresponding html-entities, remove direct update of state-reading (use stateFormat for that)
I2C_LCD:
Support for custom and special characters

- remove fixed replacements like ä => ae
- add attr replaceRegex for replacements needed by the used display
- add attr customChar0-7 for custom chars
- replace \x{XY} with char XY to access non ASCII and custom chars

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@6721 2b470e98-0d58-463d-a4d8-8e2adae1ed80
I2C_LCD:
- replace unicode-chars by corresponding html-entities
- remove direct update of state-reading (use stateFormat for that)

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@6722 2b470e98-0d58-463d-a4d8-8e2adae1ed80