Added new tests: test-add-word-message-existence, test-add-words-message-existence, test-split-words-existence, test-proper-word?-existence, and test-process-add-word-existence
Added new tests: test-add-word-message-existence, test-add-words-message-existence, test-split-words-existence, test-proper-word?-existence, and test-process-add-word-existence

tisnik/zg,tisnik/zg