useless variales replaced by static members of classes
huge change

@commenting modified
@user-list method of fetching users implemented
@ip based method of refreshing user discarded
@ip based method of user detection implemented
@added background worker to do task of checking online users
@an overloaded method of populateUserlist  added
ping method for determining users added to form.cs and bgw added for that
user.cs ping method depreciated

@all other related function removed
@commenting made better for getUsers()
implementation of previous commit to form1.cs
listview control added : column wise

#crawler.cs
added function to return file owner
new screenshot during developement
minor changes
listview UI working on dblclk action

@recursive file view added
@filter now selectall on click
@minor change to crawler.cs added getUpUrl()
major changes file size retrieved

@a function refreshUserList() specifically for refreshing listview
@code snippet added to get file size of files showing in listview