Add preview_max_size option.
Strip leading whitespace when parsing config
fix improper display of disk free size on os x
Added setting to specify whether bookmarks are included in tab-complete for cd command

Because this feature really annoyed me.
Merge branch 'master' of https://github.com/introom/ranger
Merge branch 'cd_bookmarks' of https://github.com/serpent7776/ranger
doc/ranger.pod: added man page entry for "cd_bookmarks" setting
Merge branch 'master' of https://github.com/pkkm/ranger
Merge branch 'master' of https://github.com/punzik/ranger
doc/ranger.pod: Added man page entry for "preview_max_size" setting
config/rc.conf: Added default value for preview_max_size
container.file: disable preview_max_size when value is 0
config/rc.conf: polishing
container.settings: sort ALLOWED_SETTINGS alphabetically