Added /upgrade to TODO.
Tweaked README, fixed links.
Use -Werror when compiling.
Removed twc-data.{h,c}.
Fixed typo.
Prepare for release

Signed-off-by: Kill Your TV <killyourtv@i2pmail.org>
Added SQLite persistent storage for friend requests.
Added group chat code.
Wrote group chat invite code.
More group chats.
Added twc_uint32_reverse_bytes function.
Added /nospam command.
Prevented crash when typing into group chats.
Added name and Tox ID completion.
sd.
Fixed bugs with names containing spaces.
Formatting.
Added profile to buffer names to avoid conflicts.
Fixed group chat joining.
Updated README.md.