enable precompilation and use requires for Juno (#10)

REQUIRE

@@ -2,5 +2,4 @@ julia 0.6.0-pre
 MacroTools
 DataStructures
 Requires
-Juno
 Crayons

src/PGFPlotsX.jl

@@ -1,10 +1,11 @@
+__precompile__()
+
 module PGFPlotsX
 
 import MacroTools: prewalk, @capture
 
 using DataStructures
 using Requires
-import Juno: Juno, @render, media, Media, Hiccup
 
 const DEBUG = haskey(ENV, "PGFPLOTSX_DEBUG")
 const CUSTOM_PREAMBLE_PATH = joinpath(@__DIR__, "..", "deps", "custom_preamble.tex")
@@ -69,16 +70,13 @@ A `TikzElement` is a component of a `TikzPicture`. It can be a node or an `Axis`
 abstract type TikzElement <: OptionType end
 
 include("axislike.jl")
-
 include("tikzpicture.jl")
 include("tikzdocument.jl")
 include("requires.jl")
 include("build.jl")
 
-function __init__()
-    if DEFAULT_ENGINE == "pdflatex"
-        latexengine!(PDFLATEX)
-    end
+if DEFAULT_ENGINE == "PDFLATEX"
+    latexengine!(PDFLATEX)
 end
 
 end # module

src/axiselements.jl

@@ -122,9 +122,9 @@ end
 
 
 
-Coordinates(x::AbstractVector, y::AbstractVector; kwargs...) = Coordinates(transpose(hcat(x, y)); kwargs...)
+Coordinates(x::AbstractVector, y::AbstractVector; kwargs...) = Coordinates(permutedims(hcat(x, y), (2,1)); kwargs...)
 
-Coordinates(x::AbstractVector, y::AbstractVector, z::AbstractVector; metadata = nothing) = Coordinates(transpose(hcat(x, y, z)); metadata = metadata)
+Coordinates(x::AbstractVector, y::AbstractVector, z::AbstractVector; metadata = nothing) = Coordinates(permutedims(hcat(x, y, z), (2,1)); metadata = metadata)
 
 Coordinates(x::AbstractVector, f::Function; metadata = nothing) = Coordinates(x, f.(x); metadata = metadata)
 
@@ -265,7 +265,7 @@ function print_tex(io::IO, v::AbstractVector, ::Table)
 
         println(io)
 
-        v_mat = hcat(vs...)'
+        v_mat = permutedims(hcat(vs...), (2,1))
 
         for j in 1:size(v_mat, 2)
             for i in 1:size(v_mat, 1)

src/tikzdocument.jl

@@ -202,21 +202,23 @@ if HAVE_PDFTOSVG
     end
 end
 
-media(_SHOWABLE, Media.Plot)
-
 _JUNO_PNG = false
 _JUNO_DPI = 150
 show_juno_png(v::Bool) = global _JUNO_PNG = v
 dpi_juno_png(dpi::Int) = global _JUNO_DPI = dpi
 
-function Media.render(pane::Juno.PlotPane, p::_SHOWABLE)
-    f = tempname() * (_JUNO_PNG ? ".png" : ".svg")
-    save(f, p; dpi = _JUNO_DPI)
-    Media.render(pane, Hiccup.div(style="background-color:#ffffff",
-                       Hiccup.img(src = f)))
+@require Juno begin
+    import Media
+    import Hiccup
+    Media.media(_SHOWABLE, Media.Plot)
+    function Media.render(pane::Juno.PlotPane, p::_SHOWABLE)
+        f = tempname() * (_JUNO_PNG ? ".png" : ".svg")
+        save(f, p; dpi = _JUNO_DPI)
+        Media.render(pane, Hiccup.div(style="background-color:#ffffff",
+                           Hiccup.img(src = f)))
+    end
 end
 
-
 if HAVE_PDFTOPPM
     function savepng(filename::String, td::TikzDocument; latex_engine = latexengine(),
                      buildflags = vcat(DEFAULT_FLAGS, CUSTOM_FLAGS),