Merge pull request #653 from mpmont/develop

Added the mime type for pptx.
diff --git a/application/config/mimes.php b/application/config/mimes.php
index ea01925..c43f1fc 100644
--- a/application/config/mimes.php
+++ b/application/config/mimes.php
@@ -57,6 +57,7 @@
 				'mif'	=>	'application/vnd.mif',
 				'xls'	=>	array('application/excel', 'application/vnd.ms-excel', 'application/msexcel'),
 				'ppt'	=>	array('application/powerpoint', 'application/vnd.ms-powerpoint'),
+				'pptx'	=> 	'application/vnd.openxmlformats-officedocument.presentationml.presentation',
 				'wbxml'	=>	'application/wbxml',
 				'wmlc'	=>	'application/wmlc',
 				'dcr'	=>	'application/x-director',
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 3a2990b..3ddd1ec 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -32,6 +32,7 @@
    -  Added support pgp,gpg to mimes.php.
    -  Added support 3gp, 3g2, mp4, wmv, f4v, vlc Video files to mimes.php.
    -  Added support m4a, aac, m4u, xspf, au, ac3, flac, ogg Audio files to mimes.php.
+   -  Added support pptx office files to mimes.php.
 
 -  Helpers