tfix pvpython script location and paths, try to merge PNGs with imagemagick - Granular.jl - Julia package for granular dynamics simulation
 (HTM) git clone git://src.adamsgaard.dk/Granular.jl
 (DIR) Log
 (DIR) Files
 (DIR) Refs
 (DIR) README
 (DIR) LICENSE
       ---
 (DIR) commit c6ba5de8b5601deef12ce01767d8be3252e21ec6
 (DIR) parent 88bb91c4a1fcf1969fc9cd789c0fa2668108eb16
 (HTM) Author: Anders Damsgaard <andersd@riseup.net>
       Date:   Wed,  1 Nov 2017 10:27:33 -0400
       
       fix pvpython script location and paths, try to merge PNGs with imagemagick
       
       Diffstat:
         M examples/logo.jl                    |       2 ++
         M src/io.jl                           |      20 ++++++++++++++++----
       
       2 files changed, 18 insertions(+), 4 deletions(-)
       ---
 (DIR) diff --git a/examples/logo.jl b/examples/logo.jl
       t@@ -165,3 +165,5 @@ SeaIce.setOutputFileInterval!(sim, .1)
        
        SeaIce.removeSimulationFiles(sim)
        SeaIce.run!(sim, verbose=verbose)
       +
       +SeaIce.render(sim, images=true, animation=false)
 (DIR) diff --git a/src/io.jl b/src/io.jl
       t@@ -681,12 +681,11 @@ function writeParaviewPythonScript(simulation::Simulation;
                                           ice_floes_color_scheme::String="X Ray",
                                           verbose::Bool=true)
            if filename == ""
       -        folder = folder * "/" * simulation.id
                mkpath(folder)
                filename = string(folder, "/", simulation.id, ".py")
            end
            if vtk_folder == ""
       -        vtk_folder = "./"
       +        vtk_folder = "."
            end
        
            open(filename, "w") do f
       t@@ -927,9 +926,22 @@ function render(simulation::Simulation; pvpython::String="pvpython",
                        animation::Bool=false)
        
            writeParaviewPythonScript(simulation, save_animation=animation,
       -                              save_images=images)
       +                              save_images=images, verbose=false)
            try
       -        run(`$(pvpython) $(simulation.id)/$(simulation.id).py`)
       +        cd(simulation.id)
       +        run(`$(pvpython) $(simulation.id).py`)
       +
       +        # if available, use imagemagick to create gif from images
       +        if images
       +            try
       +                run(`convert -trim +repage -delay 10 -transparent-color white 
       +                    -loop 0 $(simulation.id)*.png $(simulation.id).gif`)
       +            catch return_signal
       +                if isa(return_signal, Base.UVError)
       +                    error("skipping gif merge since `convert` was not found.")
       +                end
       +            end
       +        end
            catch return_signal
                if isa(return_signal, Base.UVError)
                    error("`pvpython` was not found.")