doc(README): update README file for version 2

README.md

@@ -2,26 +2,35 @@
 
 The purpose of this repository is to distribute binary executable programs for MODFLOW and related programs that will run on Windows, Mac, and Linux operating systems. Executables for these different operating systems can be found under the [release](https://github.com/MODFLOW-USGS/executables/releases) tab above and are named:
 
-* [win64.zip](https://github.com/MODFLOW-USGS/executables/releases/download/1.0/win64.zip)
-* [win32.zip](https://github.com/MODFLOW-USGS/executables/releases/download/1.0/win32.zip)
-* [mac.zip](https://github.com/MODFLOW-USGS/executables/releases/download/1.0/mac.zip)
-* [linux.zip](https://github.com/MODFLOW-USGS/executables/releases/download/1.0/linux.zip)
+* [win64.zip](https://github.com/MODFLOW-USGS/executables/releases/download/2.0/win64.zip)
+* [win32.zip](https://github.com/MODFLOW-USGS/executables/releases/download/2.0/win32.zip)
+* [mac.zip](https://github.com/MODFLOW-USGS/executables/releases/download/2.0/mac.zip)
+* [linux.zip](https://github.com/MODFLOW-USGS/executables/releases/download/2.0/linux.zip)
 
 The programs and version numbers for the present release are
 
 | Program | Version |
 |--- |---|
-| MODFLOW 6 | 6.0.3 |
+| MODFLOW 6 | 6.0.4 |
 | MODFLOW-2005 | 1.12 |
 | MODFLOW-NWT | 1.1.4 |
-| MODFLOW-USG | 1.3 |
+| MODFLOW-USG | 1.5 |
 | MODPATH-6 | 6.0.1 |
-| MODPATH-7 | 7.2.1 |
+| MODPATH-7 | 7.2.001 |
 | MT3DMS | 5.3.0 |
-| MT3D-USGS | 1.0.0 |
+| MT3D-USGS | 1.0.1 |
 | SEAWAT | 4.0.5 |
-| MODFLOW-2000 | 1.19 |
-| MODFLOW-LGR | 2.0 |
+| MODFLOW-2000 | 1.19.01 |
+| MODFLOW-LGR | 2.0.0 |
+| VS2DT | 3.3 |
+| ZONBUD3 | 3.01 |
+| ZONBUDUSG | 1.5 |
+| ZBUD6 | 6.04 |
+| GRIDGEN | 1.0.02 |
+| TRIANGLE | 1.6 |
 
-These programs are compiled using [pymake](https://github.com/modflowpy/pymake) and the Intel compiler.
+
+
+
+These programs are compiled using [pymake](https://github.com/modflowpy/pymake) and the Intel compiler. The zip files also contain a json file (code.json) that includes the current version number and the url address that can be used to download the source files used to build these programs.