Master moved ahead while I was merging in 3075. This is
the remerge.

Added main process event loop to src/bin/d2/D2Process,
which is the primary application object in b10-dchp-ddns.

Replaced use of EXPECT_EQ(false,) with EXPECT_FALSE()
in d2_process_unittests.cc.  These were failing to
compile under Fedora 18/gtest 1.6. This appears to be
a gtest bug.  Other minor changes.

Conflicts:
	src/lib/dhcpsrv/alloc_engine.cc
	src/lib/dhcpsrv/alloc_engine.h
	src/lib/dhcpsrv/tests/alloc_engine_unittest.cc

Minor corrections only, there were no major revisions.

Conflicts:
	ChangeLog

 - hooks documentation updated
 - dhcp4 message logs updated
 - long lines wrapped in dhcp4_srv.cc
 - unit-test names now use camel notation
 - Pkt4::bufferOut_ renamed to buffer_out_

Remove an old stray test command.

The new hooks tests require two shared libraries, which were not generated
when static linking was used and caused tests to fail. This patch forces
generation of these shared libraries. Okayed on jabber.

Conflicts:
	ChangeLog

Corrects a bug in Hooks code that was improperly
creating a new callout handle on every call, rather
than maintaining it throughout the context of the
packet being processed.

Also, updateLease4 and updateLease6 are implemented.