Cut the gibberish in the introduction
Let's talk about the tooling too
Have a specific section for remote shells
Add img.no-border back
Document `:override` option in mix guide
Upgrade the copyright year
Merge pull request #223 from elixir-lang/rm-upgrade-copywrite

Upgrade the copyright year
Add rebar executable
Remove bound mention
Add notes about hex.pm and ElixirConf
Merge branch 'v0.13'

Conflicts:
	index.html
Update blog post and packages link
Fix YAML mistake
Fix typo/grammar
Translate into japanese(1 Interactive Elixir)
Translate into japanese(2 Basic types)
Translate into japanese(3 Basic operators)
Translate into japanese(4 Pattern matching)
Translate into japanese(5 case, cond and if)
Translate into japanese(6 Binaries, strings and char lists)