List function added

in client.c, list_flag part is not working with strcmp. need to change
to new header structure
Merge pull request #1 from txlife/master

List function added
sm
Merge pull request #1 from comfortablejohn/master

Merge pull request #1 from txlife/master
change to header and file transfer(unsuccessful)

i tried to implement header function, but don’t know how to do it with
trustcloud.c  I did change codes for client and server. The file
transfer part did not get changed since I failed to get it work.
Merge pull request #2 from txlife/master

changes to header function (only client and server codes got changed)
Header function implemented with file_list

-implementation successful
-warnings fixed, no more warnings :)
-minor errors fixed
Merge pull request #3 from txlife/master

Header function implemented with file_list
a
Add and Fetch working. Incomplete file transfer issue is rectified