Updating fpm README section

Author: samharrison7

README.md

@@ -34,7 +34,15 @@ $ cd fortran-error-handler
 $ fpm build --flag="-fbackslash"
 ```
 
-A static library (e.g. `libfeh.a` on Linux) and `.mod` files will be generated in the `build` directory for you to use. An example executable (using `example/example_usage.f90`) will also be generated. Running `fpm test` will run tests (using `tests/run_tests.f90`) for the framework. Fpm can easily be installed using Conda: `conda install -c conda-forge fpm`.
+A static library (e.g. `libfeh.a` on Linux) and `.mod` files will be generated in the `build` directory for you to use. An example executable (using `example/example_usage.f90`) will also be generated. Running `fpm test` will run tests (using `tests/run_tests.f90`) for the framework. The `-fbackslash` flag is a GFortran flag to enable coloured terminal output, and is only needed if the `bashColors` option is `.true.` (default). The equivalent `ifort` flag is `/assume:bscc`.
+
+You can also get fpm to install the Fortran Error Handler locally (e.g. to `/home/<user>/.local`):
+
+```bash
+$ fpm install --flag="-fbackslash"
+```
+
+Fpm can easily be installed using Conda: `conda install -c conda-forge fpm`.
 
 ### Grab the files