Views for columns and constraints & rm MembersMatrix

[guimarqu]

• view for matrix slices
• move matrix in DynamicSparseArrays
• update dependencies

I'm using Juno now and it removes blank spaces at ends of line, so there are lot of changes...

[guimarqu]

Tests will pass after tag of v0.2.4 in DynamicSparseArrays.

@rrsadykov @vitornesello @FD-V I think we are ready to release v0.3.

[codecov]

Codecov Report

Merging #371 into master will decrease coverage by 0.01%.
The diff coverage is 95.55%.

@@            Coverage Diff             @@
##           master     #371      +/-   ##
==========================================
- Coverage   77.34%   77.33%   -0.02%     
==========================================
  Files          52       51       -1     
  Lines        3969     3962       -7     
==========================================
- Hits         3070     3064       -6     
+ Misses        899      898       -1     

Impacted Files	Coverage Δ
src/ColunaBase/ColunaBase.jl	100.00% <ø> (ø)
src/MathProg/formulation.jl	72.14% <88.88%> (ø)
src/MathProg/decomposition.jl	94.35% <90.00%> (ø)
src/Algorithm/colgen.jl	90.64% <100.00%> (ø)
src/MathProg/manager.jl	68.75% <100.00%> (ø)
src/MathProg/optimizerwrappers.jl	70.44% <100.00%> (ø)
src/MathProg/projection.jl	89.47% <100.00%> (-0.53%)	⬇️

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[rrsadykov]

ok for me to release 0.3. In the features, we need to pass stabilization, cut generation, strong branching and clean up to beta list.