contacts: fix and clean up conversion
contacts: fix and clean up conversion

Remove redundant defines. Add support for retrieving spouse
and anniversary; only sending that was supported previously.
Use defines from the EDS header files instead of plain strings.
Fix some cut-and-paste errors in comments. Remove mapping
of X-EVOLUTION-OFFICE to EAS_ELEMENT_OFFICELOCATION, because the
latter is also used for the ORG property - cannot do both.

simo5/evolution-activesync,simo5/evolution-activesync,simo5/evolution-activesync