Merge pull request #20 from yashmehrotra/production

[ROUTINE-MERGE]  From Production - Aug-30
Merge pull request #22 from yashmehrotra/staging

[ROUTINE-MERGE]  From Staging - Aug-30
Merge pull request #24 from yashmehrotra/staging

[ROUTINE-MERGE]  From Staging - Sep-27
Merge pull request #26 from yashmehrotra/staging

[ROUTINE-MERGE]  From Staging - Oct 9
Made category select compulsary in bot sell.php, del.php, added validations, fixed minor bugs, fixed indentation bugs
Instruction cookie for buypage
Made feedback form, added gmail icons in about page
Added category in buy.php, loading gif in feedback.php, made class for red star compulsary
still to add go to top button, improved look of buy.php, fixed size problems in buy.php
Finally , Fixed filters, it was all SQL and HTML's Fault , really sorry Javascript for abusing you , really really sorry , Javascript , the language of the Future (python rocks too)
Critical: Added data uri validation of image url, corrected order of filters in buy.php, fixed some bugs in del.php
google maps in contact, goto btn yet to improve
Fucking quotes ''''''
Revamped whole topbar(except for hompage), still to fix positioning of heading issues, added better go to top button
-Minor fixes-
Improved topbar, improved styling of buy filters
fixed minor bugs, optimised css (previous commit)
Added Lame Comment
Merge branch 'master' of https://github.com/yashmehrotra/Books-for-bucks into production
Merge branch 'production' of https://github.com/yashmehrotra/Books-for-bucks into production