ENH: redesign item.html page

1. add submission image to header using .media class
2. proper usage of <dl>
3. remove unnecessary divs
ENH: display submission type with image

1. one-person-result.html, one-search-result.html contains totally new code.
2. edit in remaining html pages are done to fit the above pages code
3. unnecessary css definitions are removed in .less (.css is compiled)
ENH: image upload form moved into bootstrap modal

1. Image upload button is placed below description using bootstrap modal
2. .no-lead class added to provide padding on the top
MAINT: improve image upload message
BUG: add media_root for image uploads in debug mode

1. in debug=true mode, images don't get uploaded unless media root is present
MAINT: bold keywords in field labels
MAINT: Upper case first letter of keywords
ENH: write markup-help.html from scratch using tables
ENH: copyrights info move from footer to rightsidebar bottom
ENH: remove btn-block class in all buttons of site

Apart from removing btn-block,
1. float submit button to right in new-item.html
MAINT: html cleanup - remove unwanted code
ENH: increase searchbar height to 40px

Note: .css file is generated one. Its included in repo for simplicity of handling the site!
Probably it can be removed later on.
ENH: remove .navigation class in rightsidebar and unwanted divs

1. remove .navigation class and respective div --unnecessary
2. add .no-lead class to <ul> to provide padding-top of 10px
ENH: clean unwanted code in html and css files

Changes to note:
1) remove .container custom width of 80% --uses default bootstrap width

Others:
1) remove all unwanted divs
2) remove unwanted css