Added skeleton of DB
Merge master into dbserver
DBServer: Replace complex arg list with arg-expander in CREATE_STORED_OBJECT
DBServer: Add DatagramIterator to test suite
DBServer: Add default value to testdc.py constants
DatabaseServer: Add message type constants to test suite.
DatabaseServer: Add reserved values to tests.
DatabaseTests: Fix DatagramIterator
DatabaseServer: Add create and selectall unit test
Adds messages.h to CMakeLists.txt
DBServer: Fix channel comparison
Docs: Describe completely how to serialize object data.
DBServer: Fix matches_header length test
DBServer: Fix DGIterator read methods
DBServer: DGIterator fix offset numbers in readers.
DBServer: Fix DGIterator read_64 unpacker
Tests: Adds helpful messages to matches_header
DBServer: DGIterator read should return only first argument.
DBServer: DGIterator add read_uint32
DBServer: Add non-required db field to last part of test_create_selectall