Version 2.2

This release incorporates new features and bug fixes over the last year. This mainly involves fixes and new features for modelling of quantum systems, like EPR squeezing, and HOM squeezing. In addition a new feature for displaying all the mode mismatches in a model can now be displayed to aid in matching files quicker. A new isolator like component called a directional beamsplitter (dbs) was added. This was because the original 3-port device couldn't handle the mix of quantum noise easily. The three port isolator component was removed. Pykat and Finesse now talk to each other via a pipe command, which will be used more in future and save writing things to disk first before reading it in to Python. Added ability to set offset via the lock command now, rather than having to define a separate function.