clean up repo:

-move layouts to layouts.jl
-add community_layout to readme
-remove deprecations
-remove shape.jl and pienode.jl (not used anywhere)

Author: hdavid16

README.md

@@ -127,6 +127,19 @@ locs_x, locs_y = shell_layout(g, nlist)
 gplot(g, locs_x, locs_y, nodelabel=nodelabel)
 ```
 
+### stress majorize layout
+```julia
+gplot(g, layout=stressmajorize_layout)
+```
+
+### community layout
+```julia
+community_id = rand(1:3, nv(g)) #membership for each node
+node_c = [colorant"red",colorant"yellow",colorant"blue"] #colors for each community
+locs_x, locs_y = community_layout(g,community_id)
+gplot(g, locs_x, locs_y, nodefillc = node_c[community_id])
+```
+
 ## Curve edge
 ```julia
 gplot(g, linetype=:curve)
@@ -159,7 +172,7 @@ gplot(h)
 + `locs_x, locs_y` Locations of the nodes (will be normalized and centered). If not specified, will be obtained from `layout` kwarg.
 
 # Keyword Arguments
-+ `layout` Layout algorithm: `random_layout`, `circular_layout`, `spring_layout`, `shell_layout`, `stressmajorize_layout`, `spectral_layout`. Default: `spring_layout`
++ `layout` Layout algorithm: `random_layout`, `circular_layout`, `spring_layout`, `shell_layout`, `stressmajorize_layout`, `spectral_layout`, `community_layout`. Default: `spring_layout`
 + `max_nodesize` Max size for the nodes. Default: `3.0/sqrt(N)`
 + `nodesize` Relative size for the nodes, can be a Vector. Default: `1.0`
 + `nodelabel` Labels for the vertices, a Vector or nothing. Default: `nothing`

src/GraphPlot.jl

@@ -17,16 +17,11 @@ export
     shell_layout,
     stressmajorize_layout
 
-include("deprecations.jl")
-
 # layout algorithms
 include("layout.jl")
-include("stress.jl")
 
 # ploting utilities
-include("shape.jl")
 include("lines.jl")
 include("plot.jl")
-include("collapse_plot.jl")
 
 end # module