Minor space correction

Minor space correction in Basic.css and eventing.js.
New BG img used in About page

New img used in About page as BG for management items.
SideAlong imgs used in Guru page

Images used side by side in About Guru page.
Changing Gallery as dynamic completely

1)  Changing Gallery to be completely dynamic - no static images part in
Gallery page;
2)  Updated Gallery with proper videos to be embedded instead of
placeholders.
Minor change to remove redundant info in Gallery

Minor JS change to remove redundant info in Gallery - no dynamic header
creation; All info becomes a static part of the XML instead.
Files to be used in Dynamic Gallery

Files to be used in Dynamic Gallery -
- one JS (for fetching XML and converting it into HTML) and
- one XML file (with basic content for two ImageSets in Gallery).