Elixir-Mode v2.2.2

• #193 - fix wrong indentation on empty line between existing code
• #195 - highlighting of capitalized modules when used as structs
• #192 - Fix (error "Lisp nesting exceeds `max-lisp-eval-depth'") which crashes correct indentation
• #190 - correct indentation for multiclause anonymous functions
• #189 - Modify indentation rules for one-line functions ending with bitstrings.
• #179 - Modify syntax highlighting so there is no differentiating between built-in and user-defined modules.
• #188 - Fix changelog.
• #187 - Add unresolved test case.
• #178 - Factor out cask install as its own task in Rakefile