Merge pull request sendgrid#319 from thiagobbt/master

Add .env_sample file

Author: Matt Bernier

.env_sample

@@ -0,0 +1 @@
+export SENDGRID_API_KEY=''

.gitignore

@@ -12,4 +12,5 @@ target
 examples/Example.java
 .settings
 .classpath
-.project
+.project
+.env

README.md

@@ -44,11 +44,16 @@ We appreciate your continued support, thank you!
 
 Update the development environment with your [SENDGRID_API_KEY](https://app.sendgrid.com/settings/api_keys), for example:
 
+1. Copy the sample environment file to a new file
 ```bash
-echo "export SENDGRID_API_KEY='YOUR_API_KEY'" > sendgrid.env
-echo "sendgrid.env" >> .gitignore
-source ./sendgrid.env
+cp .env_sample .env
 ```
+2. Edit the new `.env` to add your API key
+3. Source the `.env` file to set rhe variable in the current session
+```bash
+source .env
+```
+
 ## Install Package
 
 Choose your installation method - Maven w/ Gradle (recommended), Maven or Jar file.
@@ -229,4 +234,4 @@ sendgrid-java is guided and supported by the SendGrid [Developer Experience Team
 sendgrid-java is maintained and funded by SendGrid, Inc. The names and logos for sendgrid-java are trademarks of SendGrid, Inc.
 
 # License
-[The MIT License (MIT)](LICENSE.txt)
+[The MIT License (MIT)](LICENSE.txt)