Review documentation and code outputs for consistent application of 'Zenith Distance' vs 'Zenith Angle'

[jhaasdyk-au]

Brief description
An improvement of documentation to ensure the consistent use of 'Zenith Distance' vs 'Zenith Angle' for Type V measures.

Background [CHANGE OR DELETE IF NOT APPLICABLE]
DynAdjust v1.2.7
Current documentation appears to use 'Zenith Distance' and 'Zenith Angle' interchangeably.
Or, at very least to apply both terms to the Type V measurement.

See for example, among other:
Section 7.2.12

Section 7.2.15

Section C.2 (import log)

Basic requirements
Adopt consistent terminology throughout documentation and code, for this quantity
I have not perused the literature to see which is preferred, but Zenith Distance (V) appears to be more prevalent in our literature.
[An interesting and surprising terminology for the un-initiated, and non-astronomers among us]

Priority
Priority 3 - low