Release 0.12.4 · wkhtmltopdf/wkhtmltopdf

add support for building with VS2015
update OpenSSL to 1.0.2j and libpng to 1.6.26
[qt] change screen size in headless mode to a more sane value (1366x768)
[qt] allow screen size in headless mode to be overriden via environment variables
[qt] fix compilation failure on OS X 10.11 due to usage of deprecated APIs
#1768: allow using long argument list (without hardcoded limits)
#2004: [qt] fix rendering of form fields in PDF output
#2353: [qt] context.setLineDash doesn't work in Canvas
#2416: make background transparent by default for headers/footers
#2463: [qt] standardize rendering DPI to 96
#2673: fail immediately in the build script if the Qt source is not available
#2684: [qt] fix crash in WebKit (RenderBlock::removeFloatingObjectsBelow)
#2885: enforce UTF-8 encoding for input strings in the API
#2887: improve docs to make examples of header/footer variables more explicit
#3077: use correct install path for man pages

0.12.4