Add things to CMakeLists.txt to get compilation working

CMakeLists.txt

@@ -37,11 +37,11 @@ if (MSVC)
 endif()
 target_link_libraries(multifluid autodiff)
 
-add_executable(multifluid2 "${CMAKE_CURRENT_SOURCE_DIR}/src/multifluid2.cpp")
+add_executable(multifluid_crit "${CMAKE_CURRENT_SOURCE_DIR}/src/multifluid_crit.cpp")
 if (MSVC)
-    target_sources(multifluid2 PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/externals/Eigen/debug/msvc/eigen.natvis")
+    target_sources(multifluid_crit PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/externals/Eigen/debug/msvc/eigen.natvis")
 endif()
-target_link_libraries(multifluid2 autodiff)
+target_link_libraries(multifluid_crit autodiff)
 
 # add_executable(test_autodiff "${CMAKE_CURRENT_SOURCE_DIR}/src/test_autodiff.cpp")
 # if (MSVC)

README.md

 
 # Intro
 
+This library implements advanced derivative techniques to allow for implementation of EOS without any hand-written derivatives.  The name TEQP comes from Templated Equation of State Package
+
 [![Catch tests via Github Actions](https://github.com/ianhbell/teqp/actions/workflows/runcatch.yml/badge.svg)](https://github.com/ianhbell/teqp/actions/workflows/runcatch.yml)
 
+Written by Ian Bell, NIST.  
+
+## Build (cmake based)
+
+Be aware: compiling takes a while in release mode (multiple minutes per file in some cases) thanks to the use of generic typing in the models.  Working on making this faster...
+
+For example to build the critical line tracing example in visual studio, do:
+
+mkdir build
+cd build
+cmake .. 
+cmake --build . --target multifluid_crit --config Release
+Release\multifluid_crit
+
+On linux/OSX, similar:
+
+mkdir build
+cd build
+cmake .. -DCMAKE_BUILD_TYPE=Release
+cmake --build . --target multifluid_crit
+./multifluid_crit
+
 ### Random notes for future readers:
 
 * When building in WSL via VS Code, you might need to enable metadata to avoid pages of configure errors in cmake: https://github.com/microsoft/WSL/issues/4257