Bugfix: fix bus error on OpenBSD/sparc64 (Thanks tobiasu)

fixes #1034
Merge branch 'master' into next
Merge branch 'fix-unaligned-memory'
Bugfix: fix focus handling in 'floating disable' on non-visible windows (Thanks necoro)

fixes #1027
Merge branch 'master' into next
Merge branch 'fix-floating-criteria'
Bugfix: Ignore spaces in front of default workspace name
tests: update t/172-start-on-named-ws.t to check the previous commit
Merge branch 'master' into next
Merge branch 'fix-whitespace'
Store aspect_ratio instead of weird proportional_{width,height} (Thanks phillip)

This commit only goes to “next” because I am not sure whether it
actually makes things better in all cases and want to give it some
testing first.

There was no documented reason behind using the
proportional_{width,height} variables, so I suppose that code was just
stupidity on my part (it was written merely a month after I started this
project in 2009).

fixes #1032
Bugfix: call i3-nagbar correctly for configfiles without the font directive (Thanks xeen)

fixes #1030
Merge branch 'fix-nagbar-without-font'
Merge branch 'master' into next