restore GetChild, etc. we will need them again

Change-Id: Ic6da34e58975d85c84ded96fa90873558589f54a
XAccessibleGetAccFlowTo is missing

and there's a strange stray ifdef in MSAAService.idl

add mode-lines and remove unnecessary headerguard etc

Change-Id: I072960ac073b2c33d7d820e7dbfe02145685d3f3
Integrate branch of IAccessible2

Change-Id: I8327fb4ba2a86d4caa52b875221175b80464842a