upgrade pdf.js to v1.0.712
add pdfng module and use it by default
Merge branch 'master' into pdfng
Merge branch 'master' into pdfng
set up pdf viewer app in base
save pdf position and scale
working on zoom/fit buttons
replicate the pdflistview classes in pdfng viewer
update the margin size of pdfng
fix offset calculation to match pdflistview
use margin for height/width in pdfng
highlights/dblclick in pdfng - work in progress
highlights working for moving to position in pdf from source
convert page indices from 1-based to 0-based to match pdfListView positions
fix off by one error in viewport retrieval
clean up unnecessary redraws
Revert "upgrade pdf.js to v1.0.712"

This reverts commit 1ace92f67d91395d047281047be2f0cff5ea7848.
added pdfjs-1.0.712 in a subdirectory
started making pdf viewer conditional - work in progress
Merge branch 'master' into pdfng