fixes #83 (SVG ViewBox vs. width/height)
data iframe attributes so we can debug the src (now a Blob data URL)
SVG viewport fallback(s) w/h attributes -> viewbox -> image -> container dimensions
support for rendition:viewport as fallback #86 #84
Refactored the way css transforms are generated to better handle the case of scale=1
Merge remote-tracking branch 'origin/develop' into develop
Merge branch 'develop' of https://github.com/readium/readium-shared-js into develop
addresses #89, although we should verify support for images-in-spine on all target browsers, due to possible discrepancies in how browsers wrap images in HTML template + Readium code that attempts to manipulate the "image" spine item as if it were a regular content document
minor comments adjustments (images in spine use-case)
partially addresses #90 (only Firefox)
added boolean switch (setting enabled by default) to allow deactivation of CSS 3D GPU hardware acceleration trick (which fixes native apps WebView rendering bugs), as this can sometimes introduce unwanted display behaviours. This setting allows us to check for rendering bugs whilst excluding the possibility of 3D CSS interfering with the outcome.
Merge remote-tracking branch 'origin/develop' into feature/textWidthMargins