Doc update and new artwork (#192)

* update some of the svg and screencast
* some other minor changes in the doc relative to concurrency

Signed-off-by: Didier Vojtisek <didier.vojtisek@inria.fr>

docs/org.eclipse.gemoc.studio.doc/src/main/asciidoc/dev/GeneralArchitecture_headContent.asciidoc

@@ -13,7 +13,8 @@ footnote:[asciidoc source of this page:  https://github.com/eclipse/gemoc-studio
 
 As shown in <<img-GEMOCStudioGeneralArchitecture-MainFeatures-devguide>>, the GEMOC Studio offers several main features for the Modeling workbench and the Language Workbench. Both share features coming from the execution platform.
 
-Each component presented in this figure is actually refined depending on the technology used when implementing a given language. For example, if for a language, the Domain Specific Action (DSA) is expressed using K3, the _Engine_ will use the code produced by the _K3 DSA Compiler_. if for another language, the DSA is expressed using ALE, then the Engine will use an _ALE DSA Interpreter_.
+Each component presented in this figure is actually refined depending on the technology used when implementing a given language. For example, if for a language, the Domain Specific Action (DSA) is expressed using K3, the _Engine_ will use the code produced by the _K3 DSA Compiler_. 
+If for another language, the DSA is expressed using ALE, then the Engine will use an _ALE DSA Interpreter_.
 
 [NOTE]
 ====

docs/org.eclipse.gemoc.studio.doc/src/main/asciidoc/images/dev/ComponentsOverview.plantuml

@@ -36,6 +36,10 @@ node  "ALE Execution" as ale_execution {
   [ALE XDSML]<<not implemented yet>>
   [ALE Engine]
 }
+node  "MoccML Execution" as moccml_execution {
+  [MOCCML XDSML]
+  [MOCCML Engine]
+}
 
 commons <- simulation_model_animation
 commons <- trace
@@ -45,5 +49,7 @@ trace <- gemoc_framework
 [Execution Framework] <|.. [Java Engine]
 [XDSML Framework] <|.. [ALE XDSML] 
 [Execution Framework] <|.. [ALE Engine]
+[XDSML Framework] <|.. [MOCCML XDSML] 
+[Execution Framework] <|.. [MOCCML Engine]
 
 @enduml

docs/org.eclipse.gemoc.studio.doc/src/main/asciidoc/images/dev/GEMOCStudioGeneralArchitecture-MainFeatures.plantuml

@@ -1,5 +1,6 @@
 @startuml
-!include SkinParam.iplantuml
+
+skinparam ComponentBorderColor black
 
 left to right direction