Add stations API

[gabeduke]

• docs
• tests

[codecov]

Codecov Report

Merging #37 into develop will decrease coverage by 16.45%.
The diff coverage is 58.62%.

@@             Coverage Diff              @@
##           develop      #37       +/-   ##
============================================
- Coverage    70.37%   53.91%   -16.46%     
============================================
  Files            1        3        +2     
  Lines           54      115       +61     
============================================
+ Hits            38       62       +24     
- Misses          10       44       +34     
- Partials         6        9        +3

Impacted Files	Coverage Δ
pkg/util/common.go	14.7% <100%> (ø)
pkg/router/router.go	68.42% <50%> (-1.95%)	⬇️
pkg/httputil/httputil.go	100% <0%> (ø)

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