fix for #288

nTox will now display a message if you try to accept a not yet received
or already accepted friend request
Merge remote-tracking branch 'upstream/master'
added fix in nTox_win32.c
Use void for functions with no parameters
Merge pull request #333 from fhahn/void-parameters

Use void for functions with no parameters
Merge pull request #312 from Niautanor/master

fix for Issue #288
temporary fix to prevent m_addfriend from segfaulting
Merge pull request #334 from lukechampine/master

temporary fix to prevent m_addfriend from segfaulting
Fixed toxic friends list flicker
Added a 'clear' function to the prompt
Merge pull request #338 from Nominate/patch-1

Added a 'clear' function to the prompt
Grammar/aesthetic amendment
Merge pull request #339 from Nominate/patch-3

Grammar/aesthetic amendment
Add functions for dealing with userstatus kinds.
Make test clients compatible with userstatus kinds
No features were added, just fixed callbacks.
core: Rewrote ping-module, better performance and cleaner code.
Fix bug where handle_NATping wouldn't perform bounds checking
Fix bug where friendreq_handlepacket did not do bounds checking
Merge pull request #347 from nickodell/master

Fix bug where handle_NATping wouldn't perform bounds checking
Throws in a bell when a message is recieved, to warn to user