Merge pull request #17 from saurL/fix/imageproc-feature

fix: add imageproc text feature dependecy of text feature

Merge pull request #12 from vinlemon/feat-face-landmark

Adjust face landmark normalization and add comments

Add face landmark example

Update README

Update bird classifier model download URL

Fix face landmark model URL and adjust model resource check

Add face landmark test

Add face landmark module

Add FaceLandmarkOptions struct and related macros

Add landmark_radius_percent setter to DrawLandmarksOptions

Add face landmark model download

Merge pull request #9 from yanghaku/fix_font_error

Fix compilation errors in font #6. Thanks to the author @Moon1102(juzi <726451484@qq.com>) in PR #8.