fix PooledArray mmread/write, readme cleanup

Author: joshday

README.md

@@ -1,13 +1,13 @@
 <p align="center"><a href="http://juliadb.org" target="_blank"><img width="128" src="https://user-images.githubusercontent.com/25916/36773410-843e61b0-1c7f-11e8-818b-3edb08da8f41.png" alt="JuliaDB logo"></a></p>
 
 <p align="center">
-<a href="http://juliadb.org/latest/" target="_blank"><img src="https://img.shields.io/badge/docs-latest-blue.svg" alt="Latest documentation"></a>
+<a href="https://juliacomputing.github.io/JuliaDB.jl/latest/" target="_blank"><img src="https://img.shields.io/badge/docs-latest-blue.svg" alt="Latest documentation"></a>
 <a href="https://travis-ci.org/JuliaComputing/JuliaDB.jl" target="_blank"><img src="https://camo.githubusercontent.com/bd3887b7ff22081a1ab567075dc99f23a082cb94/68747470733a2f2f7472617669732d63692e6f72672f4a756c6961436f6d707574696e672f4a756c696144422e6a6c2e7376673f6272616e63683d6d6173746572" alt="Travis CI"></a>
 <a href="https://codecov.io/gh/JuliaComputing/JuliaDB.jl" target="_blank"><img src="https://codecov.io/gh/JuliaComputing/JuliaDB.jl/branch/master/graph/badge.svg" alt="Code Coverage"></a>
 </p>
 
 
-**JuliaDB is a package for working with large persistent data sets**
+#### JuliaDB is a package for working with large persistent data sets
 
 We recognized the need for an all-Julia, end-to-end tool that can
 
@@ -18,11 +18,7 @@ We recognized the need for an all-Julia, end-to-end tool that can
 
 We built JuliaDB to fill this void.
 
-**JuliaDB is built on [Dagger](https://github.com/JuliaParallel/Dagger.jl) and [IndexedTables](https://github.com/JuliaComputing/IndexedTables.jl)**
 
-- JuliaDB provides distributed array/table datastructures with convenient functions to load data from CSV. 
-- JuliaDB is Julia all the way down. This means queries can be efficiently composed with packages from the entire Julia ecosystem.
+#### Get Started
 
-**Get started**
-
-http://juliadb.org/latest/
+Introduce yourself to JuliaDB's features at [juliadb.org](juliadb.org) or jump into the documentation [here](https://juliacomputing.github.io/JuliaDB.jl/latest/)!

src/serialize.jl

@@ -14,18 +14,18 @@ function mmread(::Type{DataValueArray}, io, mmap)
 end
 
 #-----------------------------------------------------------------------# PooledArray
-# function mmwrite(io::AbstractSerializer, xs::PooledArray)
-#     Serialization.serialize_type(io, MMSer{PooledArray})
+function mmwrite(io::AbstractSerializer, xs::PooledArray)
+    Serialization.serialize_type(io, MMSer{PooledArray})
 
-#     mmwrite(io, xs.pool)
-#     mmwrite(io, xs.refs)
-# end
+    mmwrite(io, xs.refs)
+    mmwrite(io, xs.invpool)
+end
 
-# function mmread(::Type{PooledArray}, io, mmap)
-#     pool = deserialize(io)
-#     refs = deserialize(io)
-#     PooledArray(PooledArrays.RefArray(refs), pool)
-# end
+function mmread(::Type{PooledArray}, io, mmap)
+    refs = deserialize(io)
+    invpool = deserialize(io)
+    PooledArray(PooledArrays.RefArray(refs), invpool)
+end
 
 #-----------------------------------------------------------------------# Columns