Bamboo 0.2.0

• Refactored all code to be much more user friendly and intuitive.
• A generic heat exchanger solver has been implemented, which is now used for all simulations. This solver is more flexible than before, and allows for new features such as choice between co-flow or counter-flow cooling.
• By default, iteration is now used to find the initial inlet conditions. This removes the 'steps' in data that used to exist at the beginning of simulations.
• Any number of walls can now be added, with different materials.
• The Rao bell nozzle geometry code has been separated from the main simulation code, but is still simple to use. By default the user now inputs custom geometry.
• The mass flow rate through the engine is automatically calculated from the geometry now (based on the throat area). It is no longer required as an input.
• The extra heat transfer due to 'fins' in the cooling channels is now modelled.