Merge pull request #2 from catull/master

Small comment in Russian left in English translation
Merge pull request #3 from catull/master

English Readme
EPUB experiments.
New paths in README.
Merged.
Ebooks generated from Markdown.
Delete old theme.
English README updated.
Chapter about Immutability, correction.
Rebuild ebooks.
add waffle.io badge
Merge pull request #4 from waffle-iron/master

waffle.io Badge