Restrict valid property names.
Further restrict property names.
[Fix #104] Add ability to merge two objects.
Merge pull request #105 from skydb/104-object-merge

Add ability to merge two objects.
Fix non-existent object deletion.
Ignore missing factors on query.
Refactor schema package.
Refactor factors/query packages.
Refactor engine package.
Refactor server package.
Refactor debug package.
Makefile
Merge pull request #108 from skydb/107-refactor-packages

Refactor packages
Merge branch 'unstable' into multinode

Conflicts:
	factors/factors.go
	server/bit.go
	server/bit_test.go
	server/server.go
	server/server_event_handlers.go
	server/server_handlers.go
	server/server_query_handlers.go
	server/server_query_handlers_test.go
	server/server_table_handlers.go
	server/servlet.go
	server/test.go
	skyd/main.go