adding mesma

[16EAGLE]

adding mesma() and Rcpp nnls_solver

[codecov-io]

Codecov Report

Merging #33 into master will decrease coverage by 0.04%.
The diff coverage is 88.52%.

@@            Coverage Diff             @@
##           master      #33      +/-   ##
==========================================
- Coverage   90.21%   90.17%   -0.05%     
==========================================
  Files          46       48       +2     
  Lines        2259     2320      +61     
==========================================
+ Hits         2038     2092      +54     
- Misses        221      228       +7

Impacted Files	Coverage Δ
src/init.c	100% <ø> (ø)	⬆️
R/mesma.R	71.42% <71.42%> (ø)
src/nnls_solver.cpp	97.5% <97.5%> (ø)

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[bleutner]

sweet! looks great.

[16EAGLE]

Thanks :-)