Don't let the vcs detection cross mount point boundaries
Fixes issue 625
Fix UnicodeDecodeError when dir_limit_depth and dir_shorten_len are set
Fix handling of segment include_modes

Segments should only be included if rules for both inclusion and
exclusion are satisfied, satisfying one or the other is not sufficient.

If the include_modes list for a segment is missing or empty consider all
modes to be included so that users do not need to supply an exhaustive
list, since there isn't much point in actually wanting an empty include
list.  Actually check for mode name in the list rather than mistakenly
checking for the segment object.
Make author name ASCII
Merge branch 'fix-setup-unicode-error' into develop
Merge remote-tracking branch 'aschrab/include_modes' into develop
Merge remote-tracking branch 'kovidgoyal/fix-638' into develop
Merge remote-tracking branch 'dbrodie/unicode_path_fix' into develop
Merge remote-tracking branch 'dbrodie/fix_625' into develop
Fix #621
Merge branch 'fix-621' into develop
Merge branch 'develop' of git://github.com/Lokaltog/powerline into develop