v1.2.0: Steady Improvement

1.2.0 2015-06-06

1. Now, fix unexpected key input with |feedkeys()| by auto-nohlsearch
   feature (|incsearch-additional-usage|) #82
2. Avoid Unneeded loading for mappings like |(incsearch-nohl)|
   related with #81
3. Fix |nowrapscan| handling #83
4. Add |incsearch-config-prompt| option
5. auto-nohlsearch on |CursorMoved| after |InsertLeave| related with #80
6. Some refactoring