File transfer speed should jump up a bit faster.
Removed useless code.
Increased interval and ping packet timeout by 1 second to try to
fix TCP issues.
Fixed unaligned memory access.
Update to Libsodium 1.0.0 since backward-compatibility is guaranteed through all the 1.x.y releases.
Merge branch 'urras-master'
fix #1124 by adding salt manip functions
Also, all data now has the magic number prepended. This is incompatible
for all but the save/load functions, but I think nothing besides the one
experimental qTox branch used any of those, which is why I feel confident
about the change.
Merge branch 'dubslow-master'

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