vpc, publish, and sessionToken

multiple event sources and python runtime support

Description support (by @dlhdesign)

0.1.5 release: * HTTPS proxy support (by @dvonlehman)

0.1.4 release: * Add 'profile' option to enable load AWS credentials …

…from custom profile (by @bryannaegele)

0.1.3 release: * Add optional accessKeyId and secretAccessKey (by @ikait

)

0.1.2 release: support memorySize option (thanks @ikait)