Upgrades to orientation info and declination handling

[lkilcher]

Major changes highlighed in changelog.md, detailed changes to API documented in the docs.

[lkilcher]

Also, this replaces #46.

[codecov[bot]]

Codecov Report

Merging #50 into master will increase coverage by 0.69%. The diff coverage is 90.33%.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage   44.47%   45.17%   +0.69%     
==========================================
  Files          60       61       +1     
  Lines        7020     7113      +93     
==========================================
+ Hits         3122     3213      +91     
- Misses       3898     3900       +2

Impacted Files	Coverage Δ
dolfyn/adv/motion.py	61.04% <ø> (-0.23%)	:arrow_down:
dolfyn/io/nortek.py	89.62% <100%> (+0.19%)	:arrow_up:
dolfyn/test/test_rotate_adv.py	88.88% <100%> (+2.12%)	:arrow_up:
dolfyn/rotate/rdi.py	90.47% <100%> (-0.23%)	:arrow_down:
dolfyn/__init__.py	100% <100%> (ø)	:arrow_up:
dolfyn/rotate/__init__.py	100% <100%> (ø)	:arrow_up:
dolfyn/io/api.py	92.3% <100%> (ø)	:arrow_up:
dolfyn/_version.py	76.47% <100%> (ø)	:arrow_up:
dolfyn/rotate/signature.py	87.5% <50%> (-0.22%)	:arrow_down:
dolfyn/test/test_rotate_adp.py	80.89% <83.33%> (+0.89%)	:arrow_up:
... and 14 more

---

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[codecov[bot]]

Codecov Report

Merging #50 into master will increase coverage by 0.72%. The diff coverage is 89.76%.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage    44.5%   45.23%   +0.72%     
==========================================
  Files          60       61       +1     
  Lines        7026     7125      +99     
==========================================
+ Hits         3127     3223      +96     
- Misses       3899     3902       +3

Impacted Files	Coverage Δ
dolfyn/adv/turbulence.py	42.5% <ø> (ø)	:arrow_up:
dolfyn/adv/motion.py	61.04% <ø> (-0.23%)	:arrow_down:
dolfyn/io/nortek.py	89.62% <100%> (+0.19%)	:arrow_up:
dolfyn/test/test_rotate_adv.py	88.88% <100%> (+2.12%)	:arrow_up:
dolfyn/rotate/rdi.py	92.85% <100%> (+2.15%)	:arrow_up:
dolfyn/__init__.py	100% <100%> (ø)	:arrow_up:
dolfyn/io/api.py	92.3% <100%> (ø)	:arrow_up:
dolfyn/rotate/__init__.py	100% <100%> (ø)	:arrow_up:
dolfyn/_version.py	76.47% <100%> (ø)	:arrow_up:
dolfyn/rotate/signature.py	87.5% <66.66%> (-0.22%)	:arrow_down:
... and 15 more

---

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[lkilcher]

@mcfogarty Other than addressing the only lingering comment above, I think this is finally ready to go! Thanks so much for all your help!

[mcfogarty]

Unfortunately, it's not working. I just reprocessed an RDI .000 file and dat.props['rotate_vars'] is still only {'vel'}