minor edits

README.md

@@ -34,7 +34,7 @@ To use [run_analysis.R](https://github.com/bvonkonsky/GettingAndCleaningData/blo
 2. Obtain a copy of [run_analysis.R](https://github.com/bvonkonsky/GettingAndCleaningData/blob/master/run_analysis.R) from [Github](https://github.com/) and store it in your project directory.
 3. Run [R Studio](https://www.rstudio.com/).
 4. Use **setwd("\<project directory\>")** to set the working directory to your project directory.
-5. Use **source("run_analysis.R")** to run the script, which will create two files called **tidyMerged.csv** and **tidyAveraged.csv** in the current working directory. The original dataset is large, so please be patient. The script takes around 25 seconds to run on a 2.8 GHz Intel Core 2 Duo iMac running Mac OS X 10.8.5.
+5. Use **source("run_analysis.R")** to run the script. If necessary, the script will download and unzip the original data into the current working directory. The script creates two files called **tidyMerged.csv** and **tidyAveraged.csv**. The original dataset is large, so please be patient. Excluding the initial download and unzip, the script takes around 25 seconds to run on a 2.8 GHz Intel Core 2 Duo iMac running Mac OS X 10.8.5.
 
 
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