Naming inconsistency

https://github.com/envfluids/py2d/blob/e15e9ba5677ce9a838d1cecac7595f9a640caf60/py2d/apriori_analysis.py#L61
which name convention ? 2D_HIT or 2DHIT ? 
```python
def energyTransfer_2DFHIT(U, V, Tau11, Tau12, Tau22, Kx, Ky):
```

```python
def enstrophyTransfer_2D_FHIT(Omega, Sigma1, Sigma2, Kx, Ky):
```
