Clarify java submission instructions (#26)

* Clarify submission instructions

* Emphasize

java/README.md

@@ -6,12 +6,12 @@ A data scientist at your company would like to evaluate where the state of Maryl
 data that comes back from Maryland's Open Data Portal is not in a format that your data scientist is happy about. She
 has already written an algorithm in Spark that reads parquet files and finds anomalies. The algorithm looks at spending
 within small geographical areas. The data scientist has decided to group areas with a five character geohash and usually
-runs the algorithm against a single geohash at a time. 
+runs the algorithm against a single geohash at a time.
 
 
 ## Assignment
 
-You must pull data from https://opendata.maryland.gov/Budget/State-of-Maryland-Payments-Data-FY2008-to-FY2020/7syw-q4cy. 
+You must pull data from https://opendata.maryland.gov/Budget/State-of-Maryland-Payments-Data-FY2008-to-FY2020/7syw-q4cy.
 Because this data only contains zip codes, you'll need to also call out to
 https://nominatim.openstreetmap.org to map zip codes to latitude and longitude since you need coordinates in order to
 generate the geohash.
@@ -21,15 +21,15 @@ Nominatim has a very strict usage policy (https://operations.osmfoundation.org/p
 For the purposes of this exercise, assume the Maryland Open Data Portal is currently only returning a fraction of a percent
 of the total amount of available data. So once this moves to production, your application and the output should be written
 to handle a large amount of data.
- 
-Knowing that one of the possible ways to write out parquet files is by starting with Avro, the data scientist has provided 
-an Avro schema file (payment.avsc) as a representation of the schema she is expecting. Using Avro is not required, just one 
+
+Knowing that one of the possible ways to write out parquet files is by starting with Avro, the data scientist has provided
+an Avro schema file (payment.avsc) as a representation of the schema she is expecting. Using Avro is not required, just one
 possibility.
 
-The pom.xml file contains some libraries that may be helpful for the assignment, but feel free to use whatever libraries 
+The pom.xml file contains some libraries that may be helpful for the assignment, but feel free to use whatever libraries
 you are comfortable with.
 
 ## Wrap it up
 
-When you are finished, tar.gz all the files (only include files you would commit to source control), and send them to the person that emailed you the assignment.
-You may need to send a Google Drive or similar link if your email provider complains.
+When you are finished, tar.gz the Maven project directory (omitting any files that are transient/generated/IDE/etc), and send it to the person that emailed you the assignment.
+What you send should be **runnable** after we untar it. You may need to send a Google Drive or similar link if your email provider complains.