Added Fedora to README and added a check for shasum.

README.md

@@ -55,9 +55,15 @@ Once everything is built, you can run bitcore-node via:
 ```bash
 npm start
 ```
-
 This will then start the syncing process for Bitcoin Core and the extended capabilities as provided by the built-in Address Module (details below).
 
+### Fedora
+
+Later versions of Fedora (>= 22) should also work with this project. The directions for Ubuntu should generally work except the installation of system utilities and libraries is a bit different. Git is already installed and ready for use without installation.
+
+```bash
+yum install libtool automake autoconf pkgconfig openssl make gcc gcc-c++ kernel-devel openssl-devel.x86_64 patch
+```
 
 ### Mac OS X Yosemite
 

bin/build

@@ -61,7 +61,13 @@ if [ "${BITCORENODE_ENV}" == "test" ]; then
   options=`cat ${root_dir}/bin/config_options_test.sh`
 fi
 
-patch_file_sha=$(shasum -a 256 "${root_dir}/etc/bitcoin.patch" | awk '{print $1}')
+if hash shasum 2>/dev/null; then
+  shasum_cmd="shasum -a 256" 
+else
+  shasum_cmd="sha256sum" 
+fi
+
+patch_file_sha=$(${shasum_cmd} "${root_dir}/etc/bitcoin.patch" | awk '{print $1}')
 last_patch_file_sha=
 if [ -e "${patch_sha}" ]; then 
   echo "Patch file sha exists, let's see if the patch has changed since last build..."