organization changes

create directories for each layer of the development assurance process

UseCaseSpecification/README.md → UseCaseDevelopment/Layer0_UAV/README.md

-# Specification of the product to be developed
-*Streamlining Development Assurance - muXAV Use Case*
-
-This folder contains the specification of a toy drone named muXAV (micro
-Uninhabited Air Vehicle) intended to support experiments on various ways of
-performing development assurance.
-
-As of 2016/09/20 the folder contains only the
-RESSAC_CaseStudy_muXAV_Specification.docx and the
-RESSAC_UseCase_FAA_Dallas2016_09_15.ppt files.
-
-A Modelica model implementing the DIF part of the document is planned for fall of 2016.
+# Specification of the product to be developed
+*Streamlining Development Assurance - muXAV Use Case*
+
+This folder contains the specification of a toy drone named muXAV (micro
+Uninhabited Air Vehicle) intended to support experiments on various ways of
+performing development assurance.
+
+As of 2016/09/20 the folder contains only the
+RESSAC_CaseStudy_muXAV_Specification.docx and the
+RESSAC_UseCase_FAA_Dallas2016_09_15.ppt files.
+
+A Modelica model implementing the DIF part of the document is planned for fall of 2016.