Add summarize(data, model::JuMP.Model)

[ValentinKaisermayer]

Would it be possible to translate the MOI stuff back to JuMP?

## List of issues

Showing first 10 issues (37 issues ommitted)

 * Variable: MOI.VariableIndex(31914)
 * Variable: MOI.VariableIndex(31915)
 * Variable: MOI.VariableIndex(31916)

is not as helpfull as

## List of issues

Showing first 10 issues (37 issues ommitted)

 * Variable: $(JuMP.all_variables(model)[31914])
 * Variable: $(JuMP.all_variables(model)[31915])
 * Variable: $(JuMP.all_variables(model)[31916])

Same for the constraints:

MathOptInterface.ConstraintIndex{MathOptInterface.ScalarAffineFunction{Float64}, MathOptInterface.GreaterThan{Float64}}(518)

JuMP.all_constraints(model, JuMP.AffExpr, MOI.GreaterThan{Float64})[518]

[odow]

There are ways to get this via the programmatic API, but I guess this is asking for MathOptAnalyzer.summarize(data, model::JuMP.Model).

We also just need better documentation.

[ValentinKaisermayer]

If my constraints do not have names, what do I get then? I would prefer simply printing it.

[ValentinKaisermayer]

But in any case, I found the functionality helpful. Thx