Support running on "special" pages.

Requires enabling chrome://flags/#extensions-on-chrome-urls for the
settings pages. Switching inversion modes does not work for the webstore
because Chrome doesn't let extensions inject javascript there.
Add high DPI fix to webstore's inversion
Merge branch 'hotfix-issue-16' into dev
Remove manifest difference for dev branch

Simplify future merging of dev into master by removing the necessity of
changing "Deluminate-dev" to "Deluminate" in the manifest every time I
want to release. Improve the Makefile logic to build a "dev" version
including a "build number" in the version.
Workaround for filter not applied to whole window

Issue occurs when a page does not occupy the entire screen, so create a
fully transparent background element that occupies the full screen.

Fixes issue #17
Update version to 0.4.2
Revert "Support running on "special" pages."

This reverts commit 7aa6eff35b220e699fe36ce1148f7cff73996066.

Chrome removed my ability to operate on the webstore.
Merge branch 'dev'

* Workaround for inversion not applying to whole window