added a note about a way to get the XML schema local
The value of the reset XML element can be a hex value (0x|0X) (=<xs:extension base=spirit:scaledNonNegativeInteger>)
fixed some whitespace/indentation inconsitancies
if the VHDL vector is a single bit -> 'std_ulogic' i.s.o. 'std_ulogic_vector'.  This makes it easier to read or assign to the register
Some smaller pylint warnings fixed (no ';' at the EOL)
access mode (read-only, read-write, ...) added to the documentation
fixed the multiple driver issue with the read-only registers