Update helper_functions

- Modify check pip to make it clear it checks the system python
- Add generic sounding "run_command", in case we switch away from pipenv

script/include/helper_functions.inc.sh

@@ -2,8 +2,18 @@
 
 # Check pip to see if the given package is installed
 # (returns 0 if installed, 2 if not installed)
-check_pip_for () {
+check_system_pip_for () {
+  local package_name="${1}"
+
   # Use 'pip list' to see if the requested package is already installed
-  return $(pip list --format=columns --disable-pip-version-check | \
-	  grep -Fe "${1}" >/dev/null 2>&1)
+  pip list --format=columns --disable-pip-version-check | \
+    grep -Fe "${package_name}" >/dev/null 2>&1
+  return $?
+}
+
+# Used whenever an environment sensitive command is being run
+run_command () {
+  local cmd="${1}"
+  pipenv ${cmd}
+  return $?
 }