bug fixes, changed signatures, new functions

1)  forced end of path slash removed from copy functions for consistency
2) binary mode added when writing to files to support CRLF in Windows
3)'overwrite' parameter added to copy functions
4)'delete ' function added, 'rmdir' modified to call 'delete'
5) getHomeDir function added
6) copy functions are modified to return the whole responce object
instead of status only
7)copyFromLocal modified to pass file handle to the httpclient instead
of a string and copyToLocal modified to read from net in chunks - to
accomodate big files.