Support Python 2.6+ & 3.0+

* Seamless support of both version with same code.
* Added test version for py3 on RVM = 2.1.0.

.travis.yml

@@ -4,6 +4,7 @@ rvm:
   - 1.9.2 # Test with vim-nox package on ubuntu
   - 1.9.3 # Test against python installer
   - 2.0.0
+  - 2.1.0 # Test against python3 installer
 
 before_script: |
   if [ $(ruby -e 'puts RUBY_VERSION') = 1.9.2 ]; then
@@ -17,6 +18,10 @@ before_script: |
       sudo apt-get update -y
       sudo apt-get install -y python2.7-dev
       ./configure --with-features=huge --enable-pythoninterp
+    elif [ $(ruby -e 'puts RUBY_VERSION') = 2.1.0 ]; then
+      sudo apt-get update -y
+      sudo apt-get install -y python3-dev
+      ./configure --with-features=huge --enable-python3interp
     else
       ./configure --with-features=huge --enable-rubyinterp
     fi