Change '.' to ':'
Fix illegal pattern to CompileError

Interactive Elixir (0.15.1) raises CompileError
Merge pull request #340 from yui-knk/fix/illegal_pattern

Fix illegal pattern to CompileError
Merge pull request #339 from yui-knk/fix/ch4_colon

Change '.' to ':'
Fit to match sub title.
Merge pull request #342 from yui-knk/fix/ch6

Fit to match sub title.
Release v1.0.0-rc1
Change to the passive voice.
Fix typo
Add '$' to shell command
Fix format of ':: size(1)' outupt
Merge pull request #345 from yui-knk/fix/ch8

Fix typo
Merge pull request #346 from yui-knk/fix/ch8_2

Add '$' to shell command
Merge pull request #344 from yui-knk/fix/ch6_size

Fix format of ':: size(1)' outupt
Merge pull request #343 from yui-knk/fix/ch5_2

Change to the passive voice.