Ensure getScore and getVote have strict parameter typing

[jakewilliami]

I had to remove it because I was getting the error

ERROR: LoadError: MethodError: no method matching getVote(::Main.FaceDetection.Adaboost.HaarLikeFeature.HaarLikeObject, ::Array{Float64,2})
Closest candidates are:
  getVote(::Main.FaceDetection.Utils.HaarLikeFeature.HaarLikeObject, ::AbstractArray) at /Users/jakeireland/FaceDetection.jl/src/HaarLikeFeature.jl:97
Stacktrace:
 [1] (::Main.FaceDetection.Utils.var"#1#2"{Array{Float64,2}})(::Main.FaceDetection.Adaboost.HaarLikeFeature.HaarLikeObject) at ./none:0
 [2] iterate at ./generator.jl:47 [inlined]
 [3] collect(::Base.Generator{Array{Any,1},Main.FaceDetection.Utils.var"#1#2"{Array{Float64,2}}}) at ./array.jl:686
 [4] ensembleVote(::Array{Float64,2}, ::Array{Any,1}) at /Users/jakeireland/FaceDetection.jl/src/Utils.jl:87
 [5] #3 at /Users/jakeireland/FaceDetection.jl/src/Utils.jl:115 [inlined]
 [6] iterate at ./generator.jl:47 [inlined]
 [7] _collect(::Array{Array{Float64,2},1}, ::Base.Generator{Array{Array{Float64,2},1},Main.FaceDetection.Utils.var"#3#4"{Array{Any,1}}}, ::Base.EltypeUnknown, ::Base.HasShape{1}) at ./array.jl:699
 [8] collect_similar at ./array.jl:628 [inlined]
 [9] map at ./abstractarray.jl:2162 [inlined]
 [10] ensembleVoteAll(::Array{Array{Float64,2},1}, ::Array{Any,1}) at /Users/jakeireland/FaceDetection.jl/src/Utils.jl:115
 [11] main(::Bool, ::Bool) at /Users/jakeireland/FaceDetection.jl/src/FDA.jl:76
 [12] top-level scope at ./timing.jl:174
 [13] include(::Function, ::Module, ::String) at ./Base.jl:380
 [14] include(::Module, ::String) at ./Base.jl:368
 [15] exec_options(::Base.JLOptions) at ./client.jl:296
 [16] _start() at ./client.jl:506
in expression starting at /Users/jakeireland/FaceDetection.jl/src/FDA.jl:106

as of commit fa4352c

[jakewilliami]

Not just these functions; anything that takes feature as a parameter and expects a HaarLikeObject.