Update loader to load only if file exists

Author: BrandonRomano

lib/loader.sh

@@ -4,5 +4,8 @@
 # Loads the current environment file
 ##################################################
 Env__load(){
-    source $(Env__get_filename)
+    local to_load="$Ash__CALL_DIRECTORY/$(Env__get_filename)"
+    if [[ -f "$to_load" ]]; then
+        source "$to_load"
+    fi
 }