Better error handling

bin/gvm

@@ -8,6 +8,12 @@ if [ -z "$GVM_ROOT" ]; then
   exit 1
 fi
 
+$GVM_ROOT/bin/gvm-check
+if [[ "$?" != "0" ]]; then
+  echo "ERROR: Missing requirements. Please see messages above"
+  exit 1
+fi
+
 if [[ $1 == "version" ]]; then
   echo "Go Version Manager v$GVM_VERSION"
 elif [[ $1 == "implode" ]]; then

bin/gvm-check

@@ -1,6 +1,6 @@
 #!/bin/bash
 if [ -z `which hg` ]; then
-  echo 'Could not find mercurial (try `sudo apt-get install mercurial`)'
+  echo '* Could not find mercurial (try `sudo apt-get install mercurial`)'
   exit 1
 fi