Fix deprecation warning (#52)

Author: blegat

src/lines.jl

@@ -2,8 +2,8 @@
 Return lines and arrow heads
 """
 function graphline{T<:Real}(g, locs_x, locs_y, nodesize::Vector{T}, arrowlength, angleoffset)
-    lines = Array(Vector{Tuple{Float64,Float64}}, _ne(g))
-    arrows = Array(Vector{Tuple{Float64,Float64}}, _ne(g))
+    lines = Array{Vector{Tuple{Float64,Float64}}}(_ne(g))
+    arrows = Array{Vector{Tuple{Float64,Float64}}}(_ne(g))
     for (e_idx, e) in enumerate(_edges(g))
         i = _src_index(e, g)
         j = _dst_index(e, g)