Remove step of checking out userguide branch

Moving user guide to master, so no need to have user checkout user guide development branch.

userguide/userguide.tex

@@ -25,11 +25,9 @@ \section{Installation}
 First, we need to grab the repository:
 {\footnotesize{\tt git clone git://github.com/Qthreads/qthreads.git}}
 \\ \\
-Next, let's change into the qthreads directory and checkout the userguide branch:
+Next, let's change into the qthreads directory:
 \\
 {\footnotesize{\tt cd qthreads}}
-\\
-{\footnotesize{\tt git checkout userguide}}
 \\ \\
 Before compiling the Qthreads library, we need to setup some environment variables:
 \\ \\