Adding virtualenv_wrapper helper script.

Adding has_virtualenv function which will look for a .venv file in the
directory. If it exists, it will attempt to `workon` the project whose
name is written in the file.

For instance, if my .venv file contains the text:

oebfare

It will attempt to `workon oebfare`. As there shouldn't be a .venv
file in a directory that doesn't have a virtual env, there is no error
handling. This should be fixed.

Author: justinabrahms

.bash_profile

@@ -222,6 +222,15 @@ PS1="${RED}:${NORMAL}\@${RED}: ${CYAN}(${NORMAL}\w${CYAN})${GREEN} \$(parse_svn_
 
 source $HOME/bin/virtualenvwrapper_bashrc
 
+has_virtualenv() {
+    if [ -e .venv ]; then
+        workon `cat .venv`
+    fi
+}
+venv_cd () {
+    cd "$@" && has_virtualenv
+}
+alias cd="venv_cd"
 
 # Welcome Message
 echo -e ""