Removing test.XXX Flags (Closing #94) when importing this library

[c-f]

Hi :)
this PR closes issue nr #94 . It simply removes the testing dependencies from the doc.go document.

Before go1.2rc2 this would be necessary in order to get them with go get. However testing depencies can be gathered using the -t flag.

Thanks

[codecov]

Codecov Report

Merging #111 into develop will decrease coverage by 0.2%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #111      +/-   ##
===========================================
- Coverage    72.93%   72.72%   -0.21%     
===========================================
  Files           15       15              
  Lines          798      792       -6     
===========================================
- Hits           582      576       -6     
  Misses         128      128              
  Partials        88       88

Impacted Files	Coverage Δ
node.go	74.25% <0%> (-0.9%)	⬇️

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