Disallow too short interval
Notify when leaving page
Fix a big from new added user
Add statistical codes
Fix a bug in statisitcal codes
Move codes for statistics to backend
Add summary of success and timed out
Change path of facebook.php
Comment msg_id to prevent a rare bug
Add some error handling codes
Fix a bug in addText.php
Filter out empty strings when add text
Merge branch 'master' into dev

Conflicts:
	.gitignore
	addText.php
	alternate.php
	common_inc.php
	post.php
	stats.php
	texts.php
	users.php