follow symlink workaround

Due to a (probably) bug in git, we are unable to open github pages properly for repositories cloned inside a symlink.

How to reproduce it:
```
# inside a test folder
mkdir test; ln -s test link; cd link;
git clone git@github.com:zeke/ghwd.git
cd ghwd
./bin/ghwd
```
Merge pull request #3 from josmardias/patch-1

follow symlink workaround