commented ig.ini with instructions

ig.ini

@@ -1,4 +1,34 @@
 [IG]
+# ini file for the Implementation Guide publisher
+# uncomment or edit the lines below
+
+# ig.ini parameters:
+################
+
+##### ig #####
+# the name of the implementation guide resource file.
 ig = input/myig.xml
+
+##### template: #####
+#  the IG template that will be used to create the implementation guide (normally be a package name, but can be a local folder).
+#  example - base fhir template:
 template = fhir.base.template
-usage-stats-opt-out = false
+
+#  HL7 (non-FHIR) IG template:
+#template = hl7.base.template
+
+#  HL7 FHIR template:
+#template = hl7.fhir.template
+
+#  it's possible to specify a specific version of the template
+#template = fhir.base.template#0.1.0
+#  or the current version:
+#template = fhir.base.template#current
+#  if no version is specified, the publisher will take the #current version
+
+#  local templates can be used by prefixing a relative path with # :
+#template = #mylocaltemplate
+#template = #..\templates\mytesttemplate1
+
+#  local templates can also use absolute paths:
+#template = #C:\MyWork\ImplementationGuides\mytemplates\mytesttemplate1