Improved semantic, Ajax handlers and PHP variables

Added missed paragraph element
Changed subtitle to "Make Apps crawlable"
Removed unnecessary elements, classes, spaces
Specify PHP variables for multiple usage
Menu issue for home text
Improved semantic with HTML 5.1 element <menu>
https://plus.google.com/110977198681221304891/posts/TYHnAFQBAxQ
"async" has no affect on inline <script>
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script
jQuery selector variables specified-related dollar sign
Halt previously created request Ajax on new .change()
Set Ajax request JSON on default
Improved Ajax request error handler
Added in comment example how to bind event to Ajax loaded content
Changed headline to more reasonable "Make Apps crawlable" and added <h2>
Improved markup
Better title than "Gzip"
Improved global style normalization with more fixes and improvements

Outline issue, also for textarea
Font render issues
Cross-platform responsiveness with em value
Code clean-up
Better selectors
Improved Flexbox support, also for IE10
Improved installer handlers and UI
hr issues, responsive form elements

Fixed hr margin and float issue when mixed with other elements
label element style cleanup
Responsive form elements
Creating MySQL trigger needs for its privilege