* Do not include system headers in shared files (stdlib.h).
* Don't include lcd.h only once in each driver.
* Remove some unnecessary headers from driver (e.g. syslog.h)
* Include <poll.h> instead of <sys/poll.h>
* Spelling fixes.
* Add more documentation about the inner working of this driver.
* Consolidate constant definitions.
* Stop the 'include-mania': Only include necessary header files within the .c
files.
* Use lpt-port.h to define LPT port register values.
* Modify some comments to conform the the style guide.
- explicitely declare void arguments
- make a few string args const
* better support for shorter displays in server screen
* make target to create top level tag file
* support display heights > 4 (treated like height = 4);
* determine number of user-defineable chars using get_free_chars();
* allow custom chars starting at a character position (offset) != 0
* update and extend documentation
- successfully tested with the* *Samsung 20S204DA2* *VFD
- Improvements in the support of displays without usercharacters
- Update of the documentation.