Fill missing slides, photo section

[samundra]

Following pages are missing slides link:

• 1-Dec-2012.md
• 10-May-2014.md
• 12-Aug-2012.md
• 16-Jan-2016.md
• 23-Sep-2012.md
• 25-Jan-2014.md
• 4-May-2014.md

Most of them are also missing the media/photo. If we can fill in the missing informations we'll be in good shape. The challenging part seem to be filling in the photo section. They are scattered throughout the facebook events pages. We'll have to manage them in an album.

Note: I have also included pages from my PR request.

[geshan]

I will try to fix meetup 14: http://developers-nepal.github.io/php/meetups/05-Sep-2015/