Fix error when parsing empty SVG document.

And don't forget to call the callback.
Merge pull request #1335 from rodovich/empty-svg

Fix error when parsing empty SVG document.
Fix IText canvas handler initialization
Merge pull request #1342 from Kienz/issue-1341

Fix IText canvas handler initialization
bower.json: missed files fix
Version 1.4.6
remove ./**.* filter
bower.json: add to ignore build.js, build_all, build.sh, create_build_scripts.js, test.js and HEADER.js files
Merge pull request #1347 from Kureev/bower.json

Add more ignore files in bower.json