Update documentation.md

Under Content Types > Method #3: From items option
$.magnificPopup.open(
needs to be 
$.magnificPopup.open({
Merge pull request #37 from jeroenherczeg/patch-1

Update documentation.md
0.8.3

- Added: `goTo` public method.
- Custom events that are added to popup are now not lost when
navigating through gallery.
- If `delegate` option is used, events are now dispatched on main
element instead of children.
docs upd
Fixes #30
Merge pull request #50 from sergiolopes/patch-1

Fixes #30: demo page layout broken on Firefox and Opera
Added an option to chain public methods $.fn.magnificPopup('methodName');
Added inline type as a default one
Optimized inline module
Now content is replaced when open() is called on popup that is already opened
0.8.4 (see changelog for details)
oops (fixed bug caused by 0.8.4)
0.8.5

- Fix #43 - In IE8 whole window becomes black when YouTube iframe is
closed
- Fix #51 - In IE9 YouTube HTML5 video keeps playing after iframe is
removed from page
- Bugfix: box-sizing on IMG in low IE behaves incorrectly
- removalDelay option is now ignored in IE
- Added an option closeOnBgClick (closes #56)
- Added BeforeChange callback
- Added AfterChange callback
docs & site upd
Fix #57 - padding on body is not added with overflow:Y:'scroll'
readme upd
Fix #49 long caption overlays counter
docs upd
added word-break: break-word; to .mfp-title to avoid long non-breaking strings (such as URLs) to overlap the image gallery index count or cause page overlow
merged upstream changes