add Wiki

Conflicts:
	Readme.md
:bug: Prevent access to undefined lines in updates

It seems we are not guaranteed that all lines exists when updating the
minimap. This patch protect against access to an undefined line class
list.

Fix #95
:green_heart: Force useReactEditor to false in tests

It seems the default in the atom test environment is to run the tests
using the react editor, which make the minimap specs fails.
Merge branch 'master' into feature_react_editor_support
:bug: Fix support of react mode