Move prebuilt mesotrione vignette to web only

This addresses the 5 MB tarball size restriction on CRAN.

Removed html versions of prebuilt vignettes

Update static docs and build log

Update static docs

Prepare release of v1.2.4

- Update DESCRIPTION
- Update Makefile to document how to use R-patched
- Remove markup from two URLs to avoid CRAN NOTE
- Switch two vignettes from html_document to html_vignette to save space
  in the docs directory, also avoiding a CRAN NOTE
- Complete rebuild of pkgdown docs for release

Bump date

Confirm which test fail on R-devel

Reduce testing on CRAN servers

Tests before release

Reduce check time for CRAN, release