sample update with dynamic config
mode added back  to properties file
MODE parameter added
sample config utility calss updated
dynamic config update
readme update for dynamic config
Update README.md
readme dynamic config update
readme dynamic config update
readme dynamic config update
dynamic config sample update
dynamic config sample update
sample dynamic config update
dynamic config update
updated method names in Configuration.java and samples
Merge branch 'dev-sampleUpdate' of https://github.com/paypal/adaptivepayments-sdk-java into dev-sampleUpdate

Conflicts:
	adaptivepaymentssample/IPN-README.md
	adaptivepaymentssample/src/main/java/com/sample/adaptivepayments/Configuration.java
	adaptivepaymentssample/src/main/java/com/sample/ipn/IPNListenerServlet.java
Merge pull request #5 from paypal/dev-sampleUpdate

Dev sample update
usecase based sample
usecase based sample update
payment sample usecase update