Merge pull request #273 from simonrjones/fix/global-functions

Removing \ from global functions
fix length string -> fixed-length string
Merge pull request #275 from Sean-Der/gh-pages

Typo in password hashing article
Bump PHP current version to 5.5 in Use-the-Current-Stable-Version.md

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge commit '8d8fa72cca27b1246232b236a436e2a98fe502b2' into gh-pages

Conflicts:
	_posts/01-02-01-Use-the-Current-Stable-Version.md
	_posts/07-03-01-Password-Hashing.md