Added initial rtorrent downloader, currently testing, possibly has some bugs.

libs/rtorrent/err.py

@@ -0,0 +1,40 @@
+# Copyright (c) 2013 Chris Lucas, <chris@chrisjlucas.com>
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+from rtorrent.common import convert_version_tuple_to_str
+
+
+class RTorrentVersionError(Exception):
+    def __init__(self, min_version, cur_version):
+        self.min_version = min_version
+        self.cur_version = cur_version
+        self.msg = "Minimum version required: {0}".format(
+            convert_version_tuple_to_str(min_version))
+
+    def __str__(self):
+        return(self.msg)
+
+
+class MethodError(Exception):
+    def __init__(self, msg):
+        self.msg = msg
+
+    def __str__(self):
+        return(self.msg)