Unit tests for PDF writer; Enable `zip://zipFilename#archiveFilename` construct for image source
Remove local path from sample and add DomPDF in `composer.json` `require-dev`
Fix `Writer\Word2007\BaseTest` error
Refactor Element\Image and some samples
Enable image in HTML writer
Fix unit test error
Set image size and additional tests for HTML writer
Update composer.json and .travis.yml as per #205
Include dompdf version
HTML Writer: Enable footnotes and endnotes
Merge pull request #205 from ivanlanin/develop

Add DomPDF to composer.json and enable archive image source