Ebookmaker

- for HTML5, remove Content-Language metas
- when converting a presentational attribute to css in a style attribute, put the added css *before* existing content of the style, so as not to override it. this mimics browser behavior for cases when the two styles conflict. This won't do much good right away because tidy strips the styles into named classes.
- stop adding a viewport meta tag. it turns out this interferes with good HTML5 designs for mobile.

- fix 100. the behavior of --output-file has changed. a string passed using this argument is used to name the file where the Gutenberg ID would be. Previously it would be just the name of the output file, no matter the file type, except for Kindle, PDF and TeX. File naming for kindle was broken completely. In the past (version <0.11) --title would override the parsed or looked-up title. Title would be used in the file name if there was no Gutenberg id, or --outputfile.
- docutils rst conversion introduced a typo in 0.18 resulting in some css problems
- added exception handling in ImageParser for broken images
- don't select cover until it's needed. Ebookmaker has been generating unneeded covers in the txt step because it hasn't parsed an html file.
- for HTML5, fixed a css syntax error in the css added for the tablecols attribute
- for HTML5, make sure lang and xml:lang attributes are in sync; put invalid langs in data-invalid-lang attribute.
- for HTML5, remove height or width attributes that are 0 or empty

- one more fix for docutils 0.18+

- fixed a problem with covers selected from linked images based on the file name. (The image file would be added twice).
- fixed a problem with linked images being omitted if they also were used as the cover image
- cover images are stripped from the flow because they are re-added to the flow in the coverpages. This behavior can now be over-ridden with the x-ebookmaker-important class (as has been advertised).
- added `--config-dir` command line argument to help guiguts integrate the included tidy config file.
- update docutils to 0.18+
- fixed a problem with noimages files with caused by the parsing for .images jobs. Build order reversed!
- fixed a problem with noimages files due to broken link removal
- changed file naming methods so that Calibre file checking no longer complains.
- 0.11.25 was not deployed due to test failures.

- compatibility with docutils 0.18+. docutils' node traversal was changed from a list to an iterator.
- fixed duplicated generated cover bug. This caused errors in epubs generated by Online Ebookmaker or when the source directory is the same as the target directory.
- fix entities in generated CSS. When we generate HTML from txt or rst we must not entify '>'
- fix problem when an html source file links to a text file. Ebookmaker was trying to convert these files to html, and including them in the ebook reading order. Now, linked plain text files are only converted to utf8, nothing more.
- make sure that every img element has an alt attribute
- replace obsolete attributes for HTML5: tdbackground, tdbordercolor, trbordercolor, tablebordercolor, tableheight, tablebackground background (the last one was never a thing!)
- remove blink elements
- add missing dd elements
- make sure that lang attribute == xml:lang attributes, everywhere.
- fix issue with <CR> in metadata when setting title for conversion from text files
- update to libgutenberg 0.8.12 to fix issue with control characters in dc.title meta tags

- moves tfoot to end of tables for HTML5
- removes superfluous span attributes in tables for HTML5
- replaces frame and rules attributes in tables with equivalent css for HTML5
- checks all values of the lang and xml:lang attributes for validity, fixes common invalid values for HTML5
- fix theadalign, tfootalign, theadvalign, tfootvalign for HTML5