Travis local tests
Partial work on using travis to perform local browser tests... which fail in way different to local browser tests on a local machine.... so we need a strategy to allow failures on travis AND to automatically upload the results to the github releases page...
BUT we will overhaul and document the buildScripts before fixing this issue.
updated local tests and added bash scripts to help automate testing.
updated local tests (currently ignoring remote browser tests)
currently the browser_tests/text_visibility fails because of clipping issues (probably actually layering interactions with clipping)
added bash scripts to help install run and check the test outputs, as well as regenerate tests which fail simply due to slight layout changes.
Update travis
Sorted out building on Travis-Linux (Ubuntu 18.04) now working but need tests and upload
Attempted (and failed) to get Travis-MacOS working. Since I have no MacOS machines locally and the cost of a cloud MacOS instance is too high, I am unable to understand how to fix HomeBrew build.
ABANDONED HomeBrew for MacOS.
initial changes to suit linuxBrew
Fixed pdf2htmlEX/CMakeLists.txt to only use the CAIRO_LIBRARY_DIRS if NOT USING_BREW
Brought buildScripts/*Brew uptodate with the *Apt versions
Clean up build
Turned off unused options for both Poppler (0.89.0) and FontForge (20200314)
Removed unused (apt) pacakges
Proved that we can build on xenial (16.04), bionic(18.04), focal(20.04) (and probably eoan (19.10))
updated to poppler-0.85.0 no obvious changes
Updated to poppler 0.85.0
There were NO obvious changes needed in the code.
There were NO obvious differences in the various PDFs tested.
Poppler 0.84.0
Updated to poppler-0.84.0
Poppler 0.84.0 removed the ModRegion tracking.
We now use the bitmap's width and height (ie the whole bitmap).
This might increase the processing time as well as the output image sizes.
