Add Guard with RSpec and RuboCop

Guard understands `rspec`, `rubocop` and `specs` for both of them.
Set default plugin scope to RuboCop for now

https://github.com/khwon/loco/pull/37#issuecomment-50957418
Remove every `Internal` status in document

Inch CI now shows the document.
Set default value of EndAlignment to keyword

which is RuboCop's default configuration.

.rubocop_todo.yml is regenerated.
Add instruction for Rails cop
Fix critical bug that application won't run

  - TermApp::View was renamed to TermApp::Processor.

  - termapp/views directory was renamed to termapp/processors.
Rename view things to processor