fix version comparison

fixes this:
```
[12:24:54] ------UPDATE ----------------------------------------------
[12:24:54]       0.14.5 Latest version of gae-init
[12:24:54]      0.14.10 Your version is a bit behind
[12:24:54]    CHANGESET https://github.com/gae-init/gae-init/releases
[12:24:54] -------CLEAN ----------------------------------------------
```