remove the boring binarybuilder discussion from README, replace with something useful

README.md

@@ -5,32 +5,6 @@ This is a simple wrap of some of the libSBML functionality.
 Current status is "under development", something works, more wrapped stuff will
 be added by need.
 
-## How to use this
-
-First, build the C++ library and a wrapper and register it in your julia
-installation. You need BinaryBuilder for that:
-
-```
-Pkg] add BinaryBuilder
-```
-
-After the BinaryBuilder is installed, the build script should be able to build
-a lot of different versions of the package for possible architectures and
-configurations. You usually want to specify a single architecture to build. The
-`--deploy` option puts the new package to a place where Julia can find it
-later:
-```
-./build_tarballs.jl x86_64-linux-gnu --deploy=local 
-```
-
-After that, you should be able to load the SBML package in Julia:
-```
-Pkg] dev --local .
-julia> using SBML
-julia> getLibSBMLDottedVersion()
-"5.19.0"
-```
-
 ## Usage
 
 ```julia
@@ -43,3 +17,9 @@ m.species
 m.compartments
 ...
 ```
+
+There are several helper functions, for example you can get a nice list of reactions, metabolites and the stoichiometric matrix as follows:
+
+```julia
+mets, rxns, S = getS(model)
+```