Merge pull request #15 from ramyaps/master

pushing changes from ramyaps:fork to master Dec 03
make category dropdown z-index to 100
revise the style in index page
start to add admin control
move show_table to center
more changes
copy account menu to header and make it cool
add cool rating star, enable edit item description
add about.php for demo
some more style adjustments
done for tonight
Merge pull request #10 from updownlife/master

merging from master dec 04