Added option to include html toc in ebook
Include in navigational toc only 'tocable' items
Fix formattin of TOC items whithout label
correct images label when there is a title

since regexp is parsed in greedy mode, @title attribute was captured by
alt="(?<title>.*).
the new regexp stops at first '"'.
Merge branch 'master' into epubtoc

Conflicts:
	src/Easybook/Publishers/Epub2Publisher.php
Added test capability for EPUB files.
Added assertion for missing files in generated books.
Added test for HTML TOC generation in EPUB
Fix figures counter: Do not increment for images that are not figures
Epub: Do not replace the item slug with the generated filename 
fix code plugin when nested into other blocks

when a code blocks appears inside another block,
then it is indented one level up englobing
bloc.

This patch correct indentation detection.
Fixed internal link URLs when publishing the book as a website
you dont need this 'mkdir easybook'

If you use Composer you dont need this 'mkdir easybook'
Updated project dependencies
Merge pull request #96 from desarrolla2/patch-1

Simplified the installation instructions when Composer is used.
Simplified the installation instructions even more.
Merge pull request #94 from magabriel/fix-opt-figures

Fixed figures counter (don't increment it for "decorative images" that are not figures)
Merge pull request #85 from magabriel/epubtoc

Added a new "use_html_toc" option to include an HTML "Table of Contents" in ebooks.

This commits make easybook ebooks compliant with Kindle Publishing Guidelines (http://kindlegen.s3.amazonaws.com/AmazonKindlePublishingGuidelines.pdf)
Fixed some typos.
Indent correctly the XML contents of the `content.opf' file
Removed an unnecessary CSS file and tweaked another one