Ensure chapters have proper enumeration
Give more of an explanation of processes
Small Improvements to Chapter 12
Merge pull request #229 from rylev/ch12-changes

Small Improvements to Chapter 12
Merge pull request #228 from rylev/processes-expl

Give more of an explanation of processes
Small Changes to Chapter 14
Merge pull request #230 from rylev/ch14-changes

Small Changes to Chapter 14
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)
Translate into japanese(7 Keywords, maps and dicts)