Update README

Author: SendSafely-GitHub

SampleApplication/README.MD

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+SampleApplication is intended to provide a starting point for building custom Java application integrations using the SendSafely Java Client API. 
+
+#Instructions
+Download the most recent release of the SendSafely Client API, extract, and copy all of the contained jar files into the SampleApplication/lib folder.
+
+##Compile the sample
+
+`mkdir bin`
+
+`javac -cp "lib/*" -d bin src/*.java`
+
+##Run the sample
+
+```
+java -cp "lib/*;bin/" SendSafelyRefApp
+Usage: SendSafelyRefApp SendSafelyHost UserApiKey UserApiSecret FileToUpload RecipientEmailAddress
+
+This program will print out the secure URL to access the package after it has been submitted.`
+```
+
+###Command Line Argments
+ 
+- SendSafelyHost - Use your SendSafely organizaiton host or https://app.sendsafely.com
+- UserApiKey - Generate ApiKey and ApiSecret from your Edit Profile page when logged into the SendSafely web portal 
+- UserApiSecret - Generate ApiKey and ApiSecret from your Edit Profile page when logged into the SendSafely web portal
+- FileToUpload - Path to the file that is to be uploaded (i.e. /path-to-file/test.pdf)
+- RecipientEmailAddress - The email address of the person you want to send the file to (i.e. [email protected])
+