adding virtualenv and easy-installer

activate

@@ -0,0 +1,11 @@
+[ -n "$BASH_SOURCE" ] \
+    || { echo 1>&2 "source (.) this with Bash."; exit 2; }
+(
+    cd "$(dirname "$BASH_SOURCE")"
+    [ -d .build/virtualenv ] || {
+        virtualenv .build/virtualenv
+        . .build/virtualenv/bin/activate
+        pip install -r requirements.txt
+    }
+)
+. "$(dirname "$BASH_SOURCE")/.build/virtualenv/bin/activate"