Replaced jamm with peakranger for valid peak calling tools. Added path as...

Replaced jamm with peakranger for valid peak calling tools.  Added path as optional param for arguments.

chipathlon/conf.py

@@ -33,7 +33,7 @@ peak_tools = [
     "spp",
     "macs2",
     "gem",
-    "jamm",
+    "peakranger",
     "ccat"
 ]
 
@@ -103,7 +103,7 @@ argument_types = {
 # Defines information about arguments
 argument_keys = {
     "required": ["type", "changeable", "has_value"],
-    "optional": ["required", "default", "file_type"]
+    "optional": ["required", "default", "file_type", "path"]
 }
 
 # workflow_job keys