* fix prepare-commit.sh when SIP file is not created yet
* raise an error if header doesn't have EXPORT macro for class definition
* sipdiff can generate the SIP file on demand
* add demo file and start a short doc
* fix some annotations
* do not display hidden line (SIP_SKIP, delete)
* use a defined var for SIP_SKIP
* remove constructor definition in header
* fix comment after method definition in header
* add a test for sipify itself
* remove enum value assignments
* remove deleted functions
* remove private members
* remove function bodies
* remove keywords (override, inline)
* comment out but print SIP_SKIP
* allow use of #if(n)def SIP_RUN and remove code in #else statements
* fix PyName
* fix SIP_SKIP
* add a list of auto-generated sip files and a script to build them at once