Fix failing PDF fontsize verbatim test.

The failure happens on unspecified behavior of `Dir.glob('*')` order.
The assertion can only pass for input files which contain a `\code{}` macro,
the only one of which is a_chapter.tex.
images large than the book width, max-width set to 100
Remove badges
Merge branch 'master' of https://github.com/softcover/softcover
Improve epubcheck detection

Epubcheck can be installed via package manager or otherwise made
available on a system and need not be expected in the archive-extracted
path only.
Merge branch 'fix-pdf-test' of https://github.com/cirosantilli/softcover into cirosantilli-fix-pdf-test
Merge branch 'cirosantilli-fix-pdf-test'
Merge branch 'master' of https://github.com/softcover/softcover
Merge branch 'bugfix-epubcheck-detection' of https://github.com/TrevorBramble/softcover into TrevorBramble-bugfix-epubcheck-detection
Refactored dependency_filename
Merge branch 'TrevorBramble-bugfix-epubcheck-detection'
new PDF cover
Merge branch 'master' of github.com:softcover/softcover
new copy in pdf cover
Ignore template top level tex file.
Merge pull request #116 from cirosantilli/ignore-toplevel

Ignore template top level tex file.
Add support for \url
Merge branch 'master' of https://github.com/softcover/softcover
Fix kramdown link
Rename method