Fix keymapping for g<C-g>
Fix sentences starting with conjunctions

It is generally better not to start sentences with conjunctions.

http://blog.oxforddictionaries.com/2012/01/can-i-start-a-sentence-with-a-conjunction/
Small changes in compound adjectives
Merge pull request #670 from NigoroJr/doc_fix

Fixes in doc (keymapping and grammar)