Print what is being testing during tests and timing

[oxinabox]

The test on TravisCI have been timing out lately; due to lack of output.
I think it is because Travis is being super-slow.
but as we get more tests the possibility for it to go over 10 minutes without output increases.
We previously added print(" ") between testsets to stop this.
This PR goes further and just adds a print per include.
This is also nice for testing locally, as it gives a sense of progress.

Beyond this this PR also prints timing info so we can see which tests are taking longest.
And can catch them before any get to 10 minutes.

This is what the output looks like

Testing ChainRules.jl
Testing rulesets/Base/base.jl:   65.677611 seconds (149.48 M allocations: 7.257 GiB, 4.09% gc time)
Testing rulesets/Base/fastmath_able.jl:  81.614611 seconds (172.61 M allocations: 8.414 GiB, 4.54% gc time)
Testing rulesets/Base/evalpoly.jl:       22.094328 seconds (47.41 M allocations: 2.402 GiB, 4.42% gc time)
Testing rulesets/Base/array.jl:   4.339693 seconds (10.15 M allocations: 513.666 MiB, 5.12% gc time)
Testing rulesets/Base/arraymath.jl:      97.615484 seconds (255.76 M allocations: 12.716 GiB, 6.45% gc time)
Testing rulesets/Base/indexing.jl:       10.097454 seconds (19.88 M allocations: 1018.051 MiB, 4.23% gc time)
Testing rulesets/Base/mapreduce.jl:      23.009607 seconds (51.07 M allocations: 2.580 GiB, 5.04% gc time)

Testing rulesets/Statistics/statistics.jl:        0.809056 seconds (1.82 M allocations: 93.169 MiB, 7.08% gc time)

Testing rulesets/LinearAlgebra/dense.jl:         46.138051 seconds (97.07 M allocations: 4.818 GiB, 4.73% gc time)
Testing rulesets/LinearAlgebra/structured.jl:    39.893027 seconds (76.39 M allocations: 3.834 GiB, 4.74% gc time)
Testing rulesets/LinearAlgebra/factorization.jl:          4.975585 seconds (13.26 M allocations: 715.600 MiB, 6.50% gc time)
Testing rulesets/LinearAlgebra/blas.jl:  25.684569 seconds (87.81 M allocations: 6.821 GiB, 11.84% gc time)

Testing rulesets/Random/random.jl:        0.483092 seconds (457.58 k allocations: 25.771 MiB)

Testing rulesets/packages/NaNMath.jl:     0.000101 seconds (76 allocations: 4.734 KiB)
Testing rulesets/packages/SpecialFunctions.jl:  ┌ Warning: `lgamma(x::Real)` is deprecated, use `(logabsgamma(x))[1]` instead.
│   caller = test_scalar(::typeof(lgamma), ::Float64; rtol::Float64, atol::Float64, fdm::FiniteDifferenceMethod{Array{Int64,1},Array{Float64,1},FiniteDifferences.var"#27#28"{FiniteDifferenceMethod{Array{Int64,1},Array{Float64,1},FiniteDifferences.var"#default_bound_estimator#19"{Int64}}}}, fkwargs::NamedTuple{(),Tuple{}}, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at testers.jl:120
<<GIANT PILE OF DEPRECATION WARNINGS>>
└ @ Core ~/.julia/packages/ChainRulesCore/LsNyE/src/rule_definition_tools.jl:194
 32.885779 seconds (64.71 M allocations: 3.122 GiB, 6.75% gc time)

Test Summary: |  Pass  Total
ChainRules    | 18881  18881
    Testing ChainRules tests passed