Updated readme with new build instructions

README.md

@@ -1,39 +1,17 @@
 ### Installing CTEM for code development
 ************************************
 
-CTEM uses Autotools to automate makefile generation. To set up your system, 
-first run the script 
+CTEM uses CMake to automate the build process. You will need at least version 3.6.0.
 
-`$ ./autogen.sh`
-
-You may have to modify the contents of src/Makefile.am in order to set the 
-appropriate flags for your compiler.  The default file contains examples of 
-common flags (optimized code vs. debugging code) for gfortran and ifort.  Simply
-activate the appropriate set of flags for your system.
-
-From then on, you simply need to execute the following:
+To build the executable and all artifacts in a directory called `build/`, simply run the following commands from the CTEM root directory:
 
 ```
-$ cd build
-$ ../configure
-$ make clean
-$ make
+$ cmake -B build -S .
+$ cmake --build build
 ```
 
-The executable that is generated is `build/src/CTEM`
-
-
-************************************
-### Running CTEM
-************************************
-An example CTEM simulation is included in the idl directory. You can execute the
-CTEM run using the IDL frontend using:
+To clean all build artifacts, you can execute the included `distclean.cmake` script with the following command:
 
-`$ idl < start.in`
-
-Alternatively you may wish to use the Python front end.
-
-
-`$ python3 ctem_driver.py`
-
-The run parameters are controlled by the ctem.in file.
+```
+$ cmake -P distclean.cmake
+```