doc(modeps); update modules diagram with composition.py

Author: ankostis

docs/GraphtikModuleDependencies.dot

@@ -21,7 +21,7 @@ digraph {
                  fillcolor=wheat
                  URL="reference.html#module-graphtik.modifiers"];
     }
-    "op.py"          [shape=component
+    "composition.py"    [shape=component
                 tooltip="(public)"
                 fillcolor=wheat
                  URL="reference.html#module-graphtik.op"];
@@ -33,10 +33,6 @@ digraph {
                 tooltip="(private)"
                  fillcolor=AliceBlue
                  URL="reference.html#module-graphtik.execution"];
-    "pipeline.py"       [shape=component
-                tooltip="(public)"
-                 fillcolor=wheat
-                 URL="reference.html#module-graphtik.pipeline"];
     "plot.py"        [shape=component
                 tooltip="(extra)"
                  fillcolor=Aquamarine
@@ -46,13 +42,12 @@ digraph {
                  fillcolor=Aquamarine
                  URL="reference.html#module-graphtik.sphinxext"];
 
-    {"pipeline.py", "network.py", "execution.py", "plot.py", "sphinxext/"} -> "op.py" [
+    {"network.py", "execution.py", "plot.py", "sphinxext/"} -> "composition.py" [
                 tooltip="(import-time)"];
     "base.py" -> "plot.py" [tooltip="(run-time)" style=dashed];
     "execution.py" -> "network.py"    [tooltip="(import-time)"];
     "network.py" -> "execution.py"    [tooltip="(run-time)" style=dashed];
-    "pipeline.py" -> "network.py"        [tooltip="(run-time)" style=dashed];
-    "op.py" -> "pipeline.py"        [tooltip="(run-time)" style=dashed];
+    "composition.py" -> "network.py"        [tooltip="(run-time)" style=dashed];
     "plot.py" -> {"network.py", "execution.py"}    [tooltip="(run-time)" style=dashed];
     "sphinxext/" -> {"plot.py", "execution.py"}    [tooltip="(import-time)"];
 }