Search through readme and documentation of packages and functions based on a query. Unlike apropos, Help uses TF-IDF instead of sub-string search.
Run update() first to build the data needed for search.
julia> using Help
julia> help("Gray scale an image")
Help Results
---------
1. Images
2. ImageView
3. TestImages
4. ImageRegistration
5. SloanDigitalSkySurvey
julia> using MySQL
julia> help(MySQL, "get the last inserted id")
Help Results
---------
1. mysql_insert_id
julia> help(Base, "convert pointer to array")
Help Results
---------
1. pointer_to_array
2. oftype
3. bitpack