Use userdata.json files for ADPs

[lkilcher]

Also, use declination in those files for inst2earth rotations.

This addresses #35 and #34.

[lkilcher]

How are we going to check that magnetic_var_deg is already included in the heading data? (i.e. we need to confirm the assumptions in 56fd046).

[codecov[bot]]

Codecov Report

Merging #36 into master will increase coverage by 0.39%. The diff coverage is 81.35%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   43.97%   44.36%   +0.39%     
==========================================
  Files          61       60       -1     
  Lines        6986     7010      +24     
==========================================
+ Hits         3072     3110      +38     
+ Misses       3914     3900      -14

Impacted Files	Coverage Δ
dolfyn/adp/clean.py	0% <ø> (ø)	:arrow_up:
dolfyn/adv/motion.py	60.35% <0%> (-0.24%)	:arrow_down:
dolfyn/adp/base.py	46% <0%> (+1.55%)	:arrow_up:
dolfyn/rotate/signature.py	87.71% <100%> (ø)	:arrow_up:
dolfyn/io/nortek2.py	82.66% <100%> (+0.23%)	:arrow_up:
dolfyn/io/nortek.py	89.42% <100%> (+2.41%)	:arrow_up:
dolfyn/rotate/rdi.py	88.23% <100%> (+7.38%)	:arrow_up:
dolfyn/rotate/vector.py	82.72% <100%> (ø)	:arrow_up:
dolfyn/tools/misc.py	60.13% <100%> (ø)	:arrow_up:
dolfyn/io/rdi.py	68.24% <47.82%> (-0.77%)	:arrow_down:
... and 3 more

---

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[codecov[bot]]

Codecov Report

Merging #36 into master will increase coverage by 0.28%. The diff coverage is 76.58%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   43.97%   44.25%   +0.28%     
==========================================
  Files          61       61              
  Lines        6986     7011      +25     
==========================================
+ Hits         3072     3103      +31     
+ Misses       3914     3908       -6

Impacted Files	Coverage Δ
dolfyn/adp/clean.py	0% <ø> (ø)	:arrow_up:
dolfyn/adv/motion.py	60.35% <0%> (-0.24%)	:arrow_down:
dolfyn/adp/base.py	47.91% <0%> (+3.47%)	:arrow_up:
dolfyn/rotate/signature.py	87.93% <100%> (+0.21%)	:arrow_up:
dolfyn/io/nortek2.py	82.66% <100%> (+0.23%)	:arrow_up:
dolfyn/io/nortek.py	89.42% <100%> (+2.41%)	:arrow_up:
dolfyn/rotate/rdi.py	88.23% <100%> (+7.38%)	:arrow_up:
dolfyn/rotate/base_nortek.py	100% <100%> (+6.89%)	:arrow_up:
dolfyn/rotate/vector.py	82.88% <100%> (+0.15%)	:arrow_up:
dolfyn/tools/misc.py	60.13% <100%> (ø)	:arrow_up:
... and 8 more

---

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[lkilcher]

The travis builds had strange errors, but I'm sure we're good to go.

[lkilcher]

Resolved #34 and #35