improve performance with accent cache (#326).
adds userdefined space in tabline
workaround for #327
Merge pull request #328 from mikkeloscar/master

Adds userdefined space in tabline, workaround for #327
look up whitespace checks all the time. resolves #330.
document section layout ordering (#164).
Use VCSCommand to display revision if available
Merge pull request #335 from dzderic/master

Use VCSCommand to display revision if available