Convert calibre modules to ebook_converter.

Here is the first batch of modules, which are needed for converting
several formats to LRF. Some of the logic has been change, more cleanups
will follow.

ebook_converter/ebooks/compression/__init__.py

@@ -1,6 +0,0 @@
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import, division, print_function, unicode_literals
-
-__license__ = 'GPL 3'
-__copyright__ = '2009, John Schember <john@nachtimwald.com>'
-__docformat__ = 'restructuredtext en'

ebook_converter/ebooks/compression/palmdoc.c

@@ -219,11 +219,11 @@ static struct PyModuleDef cPalmdoc_module = {
     /* m_clear    */ 0,
     /* m_free     */ 0,
 };
-CALIBRE_MODINIT_FUNC PyInit_cPalmdoc(void) {
+PyObject* PyInit_cPalmdoc(void) {
 #else
 #define INITERROR return
 #define INITMODULE Py_InitModule3("cPalmdoc", cPalmdoc_methods, cPalmdoc_doc)
-CALIBRE_MODINIT_FUNC initcPalmdoc(void) {
+PyObject* initcPalmdoc(void) {
 #endif
 
     PyObject *m;

ebook_converter/ebooks/compression/palmdoc.py

@@ -8,12 +8,13 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 import io
 from struct import pack
 
-from calibre.constants import plugins
-from polyglot.builtins import range
-cPalmdoc = plugins['cPalmdoc'][0]
-if not cPalmdoc:
-    raise RuntimeError(('Failed to load required cPalmdoc module: '
-            '%s')%plugins['cPalmdoc'][1])
+from ebook_converter.constants import plugins
+from ebook_converter.ebooks.compression import cPalmdoc
+from ebook_converter.polyglot.builtins import range
+#cPalmdoc = plugins['cPalmdoc'][0]
+#if not cPalmdoc:
+#    raise RuntimeError(('Failed to load required cPalmdoc module: '
+#            '%s')%plugins['cPalmdoc'][1])
 
 
 def decompress_doc(data):