add tangle and weave stub files

polymode-tangle.el

@@ -0,0 +1,3 @@
+(defgroup polymode-tangle nil
+  "Polymode Tanglers"
+  :group 'polymode)

polymode-weave.el

@@ -0,0 +1,62 @@
+(defgroup polymode-weave nil
+  "Polymode Weavers"
+  :group 'polymode)
+
+(defclass pm-weaver (polymode)
+  ((from-to
+    :initarg :from-to
+    :initform '()
+    :type list
+    :custom list
+    :documentation
+    "A list of lists of the form (from-ext to-ext doc string-or-function).")
+   (function
+    :initarg :function
+    :init-value nil
+    :type (or null function)
+    :documentation
+    "Actuall function to be called with ..."
+    )
+   (sentinel
+    :initarg :function
+    :init-value nil
+    :type (or null function)
+    :documentation
+    "Sentinel to be called ..."
+    ))
+  "Exporter class")
+
+(defmacro polymode-register-weaver (name &rest polymodes)
+  "Register weaver NAME with all POLYMODES.
+
+By convention weaver names start with 'pm-weaver/'.
+
+Weavers are alists that of the form
+
+ ((extension1 . function-or-string1)
+  (extension2 . function-or-string2)
+  ...
+  )
+
+Polymode names are either full names of the config
+objects (e.g. pm-config/markdown) or a short name of the
+mode (e.g. markdown).
+
+'extensionI' is either a file name extension or a list of
+extensions that this weaver can process.
+
+'function-or-stringI' can be either a function of one argument,
+input file name, or a command to be executed on the current file
+if it has the extension '.extensionI'.
+
+Last 'extensionN' can be t, in which case function-or-stringN is
+called on the current file irrespective of its extension.
+
+
+Weavers are inherited by config objects. So for example if
+pm-config/B inherits (is cloned) from pm-config/A and you
+registered weaver pm-weaver
+"
+  ...)
+
+