Fixes #216 (#218)

* Fixes #216

It appears the problem was a mismatch between an argument name in
install.sh-usage (--branch) and the corresponding argument in
prerequisites/build.sh (--install-branch).

* Doc fix: alphabetize build.sh --help output

Author: Damian Rouson

install.sh-usage

@@ -1,4 +1,4 @@
-  -b --branch [arg]           Install the specified repository development branch.
+  -b --install-branch [arg]           Install the specified repository development branch.
   -B --list-branches [arg]    List the available branches in the specified package's repository.
   -c --with-c [arg]           Use specified C compiler. 
   -C --with-cxx [arg]         Use specified C++ compiler. 

prerequisites/build.sh

@@ -88,7 +88,7 @@ info "__os: ${__os}"
 info "__usage: ${__usage}"
 info "LOG_LEVEL: ${LOG_LEVEL}"
 
-info "-b (--branch):           ${arg_b} "
+info "-b (--install-branch):   ${arg_b} "
 info "-B (--list-branches):    ${arg_B} "
 info "-c (--with-c):           ${arg_c} "
 info "-C (--with-cxx):         ${arg_C} "

prerequisites/build.sh-usage

@@ -8,8 +8,8 @@
   -f --with-fortran [arg]     Specify Fortran compiler location. Default="gfortran"
   -h --help                   This page.
   -i --install-prefix [arg]   Install package in specified path. Default="${OPENCOARRAYS_SRC_DIR%/}/prerequisites/installations/"
-  -j --num-threads [arg]      Number of threads to use when invoking make. Default="1"
   -I --install-version [arg]  Package version to install. (To see default, use -V or --print-version)
+  -j --num-threads [arg]      Number of threads to use when invoking make. Default="1"
   -l --list-packages          List the packages this script can install.
   -m --with-cmake [arg]       Use the specified CMake installation. Default="cmake"
   -M --with-mpi [arg]         Use the specified MPI installation.