r41Beta6

[Chris Muller]

More improvements.

- Added two new special operators specifically for MaKeywordIndexes;
#includesAllPrefixes: and includesAnyPrefix:.  These allow keyword
searching by keyword *prefixes*, so the ending of the words doesn't
have to be correctly guessed.

- Clients and server may now specify their own #compressThreshold:,
which affects the messages they send.  Requests larger than this
threshold will be compressed.  #useCompression: is also included to
avoid compression altogether.  This would be desirable for web
applications where multiple web clients are connected to a separage
Magma server image running on the same machine.  Since there is no
network transport, compression is wasteful.

- Removed "hostAddress" nomenclature in all public API's.  Ip
addresses may still be specified by using a hostname of '1.2.3.4'.

This version is recommended for on-going development.