Add base search bar in sidebar
Focus search input when opening
Add keyboard shortcut "f" for opening search bar
Hide the search bar when pressing ESC key
Change norm of core/state
Blur search input when hidding search bar
Move search bar as global
Filter summary using search bar
Reset search results when hidding search bar
Open sidebar when opening search
Fix loading of search index in sub directories
Use cache in localstorage to store search index
Merge pull request #40 from GitbookIO/feature/searchclient

Feature/searchclient