Licensing & phonemizer changes
This release removes all direct linking against libespeak and other phonemizer libraries. Phonemization is now performed via external command-line tools (preferably through STDIN), keeping NV Speech Player and the Phoneme Editor fully GPLv2-compliant while still allowing use of GPLv3 phonemizers such as eSpeak NG as separate programs. Functionality is unchanged for users, but the integration is now cleaner, more flexible, and license-safe.