Provide function wrappers for AMQP commands

[oubiwann]

Features and Tasks:

• Examine kanin-supported AMQP commands to determine wrapper feasibility - Examine kanin-supported AMQP commands to determine wrapper feasibility #36
• Prototype a macro capable of providing a good developer experience for kanin AMQP commands - Prototype a macro capable of providing a good developer experience for kanin AMQP commands #37
• Re-assess level of effort for implementing kanin AMQP commands - Re-assess level of effort for implementing kanin AMQP commands #38
• Build list of AMQP commands requiring wrapping - Build list of AMQP commands requiring wrapping #39
• Implement AMQP command wrappers - Implement AMQP command wrappers #40

Part of release v0.7.0