update vital-over: fix digraphs
spec: specify locale
doc: revise documentation for :IncSearchNoreMap

close #40
Fix \%#= handling for highlight

fix #24
Add IncsearchExecute event

fix #17
doc: add document for IncSearchExecute
doc: fix document for custom autocmd event
spec: add spec for autocmd event
Merge branch 'add-on-execute' into dev
fix some errors for set re=1

fix #27
spec: fix spec
Merge branch 'dev'