Rewrote Filesystem->getDataFromFile file for clarity

Reworked the code to make it clearer, and expanded on comments.
Fixed comment typo
fixed typo
Merge pull request #60 from staabm/doctypo

fixed typehint in phpdoc
Merge tag 'v0.10.1' of https://github.com/tedivm/Stash into HEAD

Version 0.10.1
FIX: allow the FileSystem driver to configure the key hashing function.
FIX: throw an exception when the key hash function does not exist instead of defaulting to md5.
Add test for keyHashFunction option in the FileSystem driver, test for success and for the exception.
Add test to check that directories are created using the key hash function.
Merge pull request #62 from pwhelan/win32fixes

Allow configuring the key hash function for the FileSystem driver
Fleshed out comments.
Merge pull request #57 from tedivm/data_bug

Reworking of Filesystem handler
Merge pull request #58 from staabm/patch-1

Fixed comment typo
Updated PEAR package.xml file.
Merge pull request #64 from tedivm/0.10.2-packaging

Updated PEAR package.xml file.
Update $drivers to contain Backhole

Needed for StashBundle to be able to use this as a fallback.
Merge pull request #65 from andrerom/patch-1

Update $drivers to contain BackHole