Initial commit of pyhyd, a Python hydraulic functions library
Vectorized x_sec_area and dyn_visc functions
Vectorized the following functions: hyd_grad, shear_stress, settling_velocity, turnover_time, bed_shear_velocity
Vectorized friction_factor func - all funcs now accept scalar, vector or
a mixture of inputs
Removed superflous np.vectorize calls from end of module
Added numerical shear to flow conversion function
Added unit tests for x_sec_area function
Added wrapper around friction_factor as np.vectorize cannot handle optional arguments
Added more unit tests
Added more unit tests
Updated __init__.py to ensure that flow_from_shear func is imported
Added license file
Added dist and build to .gitignore
Allowed zero and negative flows.  Bumped version to 0.1.1
Added function for converting between flow units
Added functions for calculating hyd gradient using Hazen Williams (HW) and
for converting between HW C and Colebrook White k_s
Bumped version in setup.py, removed unnecesary matplotlib dependency,
       added scipy dependency and cleaned up setup.py
Merge branch 'old_vers'

Conflicts:
	setup.py
Added a flag to force the use of Swamee Jain (i.e. assume turb flow ) in
friction factor calcs
Finished documentation of func for converting between flow units