download_id support with better chunksize

now we have chunksize same as block which make it little faster. all
downloads going to have an ID which will be used to stop etc. new
function for xbmc to play and tell the proxy when it stopped playing
which will remove the file and stop downloading.
fixed downloader

now downloader should be working as well.
calling mechanism,
import proxy
 axelhelper =  proxy.ProxyHelper()
 print
axelhelper.download(url);
PLAYER_CORE_AUTO

now using PLAYER_CORE_AUTO
status table

just some beautification of that status page table, looks nice
Merge pull request #3 from Shani-08/master

download_id support with better chunksize