Merge pull request #122 from pelias/install_doc_edit

Install doc edit

installing.md

@@ -35,12 +35,15 @@ In general, Pelias will require:
 ## Choose your datasets
 
 Pelias can currently import data from four different sources. The contents and description of these
-sources are available on our [data sources page](./data_sources). Here we'll just focus on what to
+sources are available on our [data sources page](./data-sources.md). Here we'll just focus on what to
 download for each one.
 
 ### Who's on First
 
-There are two ways to download Who's on First data. The first is to use the pre-created
+The [Who's on First](https://github.com/pelias/whosonfirst#data) importer contains code and
+instructions for downloading WOF data.
+
+Alternatively, there are two other ways to download Who's on First data. The first is to use the pre-created
 [bundles](https://whosonfirst.mapzen.com/bundles/). These consist of a series of archives that can
 be easily extracted (instructions are on the page).