demo: Code cleanup.
add support for AVG mqflag
endian neutral helper macro to read 16/32 bits integer from unaligned memory
appa-55ii: Initial driver skeleton.
appa-55ii: driver implementation with Live and Memory data source support
appa-55ii: Coding style fixes.
gmc-mh-1x-2x: Cosmetics, whitespace, cleanups.
gmc-mh-1x-2x: Fix two compiler warnings.
gmc-mh-1x-2x: Use 'di' variable to match other drivers.
gmc-mh-1x-2x: Don't put driver-specific things in sr/SR namespace.
gmc-mh-1x-2x: Use standard API callback names for now.

If multiple functions need to be differentiated later, we can bring
back more specific names.
appa-55ii: Minor cosmetics, whitespace fixes.
teleinfo: Minor cleanups.
Centralise duplicated logging helper defines.
log prefixes: Cosmetics, consistency fixes, typo fixes.
Doxyfile/Doxyfile_internal: Update to same 1.8.5 template, sync them.

This also makes the diff from Doxyfile to Doxyfile_internal more readable.

Also, put public API docs into doxy/html-api/, private stuff into
doxy/html-internal/.
Doxyfile/Doxyfile_internal: Ignore doxy/* when creating docs.
Doxygen fixes: Hide private stuff, document some structs.
hameg-hmo: Support DC LINE coupling.
appa-55ii: Don't use _t suffix for a typedef.

Names ending with _t are reserved for POSIX.

http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html
(last line in table 2)