Update INSTALL.md
Merge branch 'pr914'
check for no systray, fixes #908
cant believe it took this long to figure out ;_;
fix #902
Style corrections

'if()' → 'if ()'
'for()' → 'for ()'
Refactor OS X updater

Went and rewrote half of it in an actually sane manner, recursive functions > nested loops.
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Merge branch 'pr921'
Merge branch 'pr922'
Merge branch 'pr923'
Merge branch 'pr926'