Remove Python 2.5 from travis and fix minimum required version in init and README

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-  - "2.5"
   - "2.6"
   - "2.7"
   - "3.2"

README

@@ -15,7 +15,7 @@ What
 ----
 
 "paramiko" is a combination of the esperanto words for "paranoid" and
-"friend".  it's a module for python 2.5+ that implements the SSH2 protocol
+"friend".  it's a module for python 2.6+ that implements the SSH2 protocol
 for secure (encrypted and authenticated) connections to remote machines.
 unlike SSL (aka TLS), SSH2 protocol does not require hierarchical
 certificates signed by a powerful central authority. you may know SSH2 as
@@ -34,7 +34,7 @@ that should have come with this archive.
 Requirements
 ------------
 
-  - python 2.5 or better <http://www.python.org/>
+  - python 2.6 or better <http://www.python.org/>
   - pycrypto 2.1 or better <https://www.dlitz.net/software/pycrypto/>
 
 If you have setuptools, you can build and install paramiko and all its

paramiko/__init__.py

@@ -18,7 +18,7 @@
 
 """
 I{Paramiko} (a combination of the esperanto words for "paranoid" and "friend")
-is a module for python 2.5 or greater that implements the SSH2 protocol for
+is a module for python 2.6 or greater that implements the SSH2 protocol for
 secure (encrypted and authenticated) connections to remote machines.  Unlike
 SSL (aka TLS), the SSH2 protocol does not require hierarchical certificates
 signed by a powerful central authority.  You may know SSH2 as the protocol that
@@ -52,8 +52,8 @@ Mailing list: U{paramiko@librelist.com<mailto:paramiko@librelist.com>}
 
 import sys
 
-if sys.version_info < (2, 5):
-    raise RuntimeError('You need python 2.5+ for this module.')
+if sys.version_info < (2, 6):
+    raise RuntimeError('You need python 2.6+ for this module.')
 
 
 __author__ = "Jeff Forcier <jeff@bitprophet.org>"