Added implicit Context.getOrNone method

[rs017991]

No description provided.

[codecov]

Codecov Report

Merging #71 into master will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #71      +/-   ##
==========================================
+ Coverage   82.45%   82.54%   +0.08%     
==========================================
  Files          16       17       +1     
  Lines         587      590       +3     
  Branches        4        4              
==========================================
+ Hits          484      487       +3     
  Misses        103      103              

Impacted Files	Coverage Δ
...in/scala/reactor/util/scala/context/SContext.scala	100.00% <100.00%> (ø)

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[sinwe]

It looks good.