Fix installing with pip

Currently you can't install tornalet with pip as it requires info in setup.py from the tornalet module itself which then depends on imports from tornado and greenlet, and greenlet won't be available in a fresh install as distutils handles this dependency last.

To fix this I've moved the module info into a `tornalet_info.txt` file which setup.py and tornalet.py just read into a list and use, which keeps the info itself in one place and loading the info into a list is a plain one liner.

I've also bumped the version to `1.0.1`, following the www.semver.org standard.