Added Common Use Cases to README

• Added common uses casess to README based on developer questions.
• Also updated ChannelApe dependencies to the latest versions.

Upgrading ChannelApe Versions

Upgrading channelape sdk versions to fix bugs and enable new features.

Integrating with channelape-web-service-sdk

• Several classes were removed and a dependency on channelape-web-service-sdk was added.
• channelape-sdk was updated to 1.2.0 to take advantage of better retry support.