Merge pull request #1286 from GEOS-ESM/feature/tclune/#1268-readme

Fixes #1268 - update to README.md

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Updated README.md
 - Refactored MAPL_Generic.F90 - lots of changes.
   - consistent indentation (emacs mode)
   - extracted helper procedures in GenericInitialize

README.md

@@ -9,14 +9,17 @@
 
 MAPL is a foundation layer of the GEOS architecture, whose original purpose is to supplement the Earth System Modeling Framework (ESMF).   MAPL fills in missing capabilities of ESMF, provides higher-level interfaces for common boiler-plate logic, and enforces various componentization conventions across ESMF gridded components within GEOS.
 
-MAPL has 7 primary subdirectories for Fortran source code.
+MAPL has 10 primary subdirectories for Fortran source code.
 1. shared - low level utilities that are used throughout the remainder of MAPL.
 2. profiler - time and memory profiling utility
 3. pfio - high-performance client-server I/O layer
-4. generic (under construction) - new home for MAPL extension of ESMF framework.
 5. base (formerly MAPL_Base) - legacy core of MAPL.   This layer will gradually evaporate under further refactoring.
-6. MAPL_cfio - this is a deprecated lower-level I/O layer that is generally replaced by GMAO_pFIO.    Not all of the strings have been cut yet.  Sometime soon, this directory will be eliminated.
-7. griddedio - layer between ESMF container and pfio library
+6. generic (under construction) - new home for MAPL extension of ESMF framework.
+7. oomph - next gen generic will eventually disappear
+8. gridcomps - Cap, History, and ExtData gridcomps used by all GEOS configurations.
+9. MAPL_cfio - this is a deprecated lower-level I/O layer that is generally replaced by GMAO_pFIO.    Not all of the strings have been cut yet.  Sometime soon, this directory will be eliminated.
+10. griddedio - layer between ESMF container and pfio library
+
 
 MAPL also has a variety of other auxiliary directories:
 1. include - include files used by external gridded components.
@@ -25,6 +28,9 @@ MAPL also has a variety of other auxiliary directories:
 4. cmake - CMake build macros
 5. MAPL_pFUnit - implements extensions of pFUnit unit testing framework that enable unit tests of grid comp run methods.   This layer should eventually be migrated into pFUnit itself.
 6. Tests - miscellaneous standalone drivers.
+7. pflogger_stub - workaround for apps that wish to avoid a dependency on pFlogger
+8. pfunit - pFUnit (unit testing framework) extensions for ESMF components
+