* Add screen and multiply blending modes
This change also fixes a sorting issue: different sorting modes
were sorted in different buckets which is incorrect. We want
to sort only by distance.
* Update release notes and Java API
* Fix build error
* Add build command for Markdeep files
build.sh -w can now be used to "rasterize" Markdeep .md.html files
to regular, static .html files. These files load faster and do not
suffer from an initial flash of uninitialized content.
This new command requires node, npm and nx to run puppeteer to
"rasterize" the Markdeep documents. This should eventually be
integrated in the actual build system to automatically re-generate
the HTML files when the Markdeep documents are edited.
* Remove unnecessary .gitignore file
* Change constant names for JS docs
