Remove use of views for performance, and use scaling + BLAS call

[mtanneau]

No description provided.

[codecov-io]

Codecov Report

Merging #8 into master will decrease coverage by 2.33%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
- Coverage   52.26%   49.93%   -2.34%     
==========================================
  Files           5        5              
  Lines         507      727     +220     
==========================================
+ Hits          265      363      +98     
- Misses        242      364     +122

Impacted Files	Coverage Δ
src/Cholesky/denseBlockAngular.jl	96.84% <100%> (-0.19%)	⬇️
src/model.jl	100% <0%> (ø)	⬆️
src/readmps.jl	0% <0%> (ø)	⬆️
src/ipm.jl	93.93% <0%> (+2.47%)	⬆️

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[coveralls]

Pull Request Test Coverage Report for Build 37

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.6%) to 51.697%

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Totals
Change from base Build 22:	-0.6%
Covered Lines:	259
Relevant Lines:	501

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💛 - Coveralls