remove WINDOW_STATUS, simplify adding and selecting chat windows
reduce number of windows, use consistent naming
remove callback introduced temporarily during refactoring
Merge pull request #479 from krisl/internalise_window_handling

remove WINDOW_STATUS, simplify adding and selecting chat windows
INSTALL.md: cd to the previous directory after installing libsodium
Merge pull request #488 from kongr45gpen/patch-1

INSTALL.md: cd to the previous directory after installing libsodium
Merge branch 'tox-bugs' of https://github.com/stqism/ToxCore into stqism-tox-bugs
Properly fixed possible realloc with size zero problem.
Fixed segfault and removed deprecated code.
Fixed broken build paths
Fixed stack problem.
Merge pull request #490 from ayberk/master

Fixed broken build paths
Fixed linux define, removed multiple defines with a single one