Boundary streams and TransmissionCompressor

[mbarlow12]

This PR addresses 2 items:

• Boundary instances exit their input stream loop if any one is "uninitialized" resulting in the loss of subsequent stream outputs
• the TransmissionCompressor only accepts a single gas input, but multiple gas streams with other names may exit the ProductionBoundary

Fixes:

• use continue in Boundary to iterate through all input streams and set their commensurate output
• use ".*gas" regex in declaring TransmissionCompressor input streams
  • Note: this is due to the ProductionBoundary now passing both export gas and gas

Fixes #21

[lloyd-rmi]

lgtm