Version 2.19.3:

- Bugfixes (g_numbox.c, pdgui.js, dialog_search.html).

- Various fixes for better vanilla compatibility (please check the
  commit log for details).

- Added new PURR_DATA and PD_FLAVOR symbols to m_pd.h to make it easier
  for 3rd party externals to check which Pd flavor they're working with.

- Updated pd-lua to 0.11.6 (tutorial updates).

- Revised README (updated some outdated information, removed some l2ork
  branding, fixed some typos and formatting glitches).