MOI.ResultCount bug fix

[harshangrjn]

• Fixing issue ModelLike of type Alpine.Optimizer does not support accessing the attribute MathOptInterface.ResultCount() #162
• README cleanup

[codecov]

Codecov Report

Merging #165 (692461a) into master (383bdbc) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

❗ Current head 692461a differs from pull request most recent head d98ec5c. Consider uploading reports for the commit d98ec5c to get more accurate results

@@            Coverage Diff             @@
##           master     #165      +/-   ##
==========================================
- Coverage   78.42%   78.37%   -0.05%     
==========================================
  Files          16       16              
  Lines        3254     3256       +2     
==========================================
  Hits         2552     2552              
- Misses        702      704       +2     

Impacted Files	Coverage Δ
src/solver.jl	92.83% <0.00%> (-0.71%)	⬇️

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