Update documentation with Python3 dependency information

HACKING

@@ -5,7 +5,7 @@
 1. Instead of running "setup.py install" after every source modification, run
    the following command:
 
-    $ sudo python setup.py develop
+    $ sudo python3 setup.py develop
 
     This will install the python package in a special development mode.  Run it
     normally.  Any updates to the code (and core pakcage data files) do not
@@ -38,7 +38,7 @@
 
 1. Run tests:
 
-    $ python setup.py test
+    $ python3 setup.py test
 
 ## Testing Inside a Virtual Machine
 
@@ -102,12 +102,10 @@ infrastructure in place for it from the start.  Use it like this:
 
 * *Modernizer* - HTML5 and CSS3 feature detection
 
-* *Python* - tested with version 2.7
+* *Python3* - Requires minimum 3.3, tested with version 3.4.1
 
 * *Twitter Bootstrap* - A responsive, mobile first front-end framework
 
-* *Withsqlite* - Python library that stores dictionaries in sqlite3
-
 The documentation has the following dependencies:
 
 * *Markdown* - format and style docs

INSTALL

@@ -13,7 +13,7 @@
     Unzip the source into a directory.  Change to the directory containing the
     program and run:
 
-    $ sudo python setup.py install
+    $ sudo python3 setup.py install
 
 3. Run Plinth:
 

setup.py

@@ -84,6 +84,7 @@ setup(
         'Natural Language :: English',
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python',
+        'Programming Language :: Python :: 3',
         'Programming Language :: Unix Shell',
         'Topic :: Internet :: WWW/HTTP :: WSGI :: Application',
         'Topic :: System :: Systems Administration',