[vala] (6 commits) Non-fast-forward update to branch wip/housekeeping

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/housekeeping' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  7998d4c... codecontext: Avoid some string copying
  22ac98d... vala: Add missing TokeType cases for to_string()
  fcf4f0d... field: Drop unused methods
  471dcd3... writer: Some string optimizations
  182b8cb... ccodewriter: Use private _bol field instead of property

Commits added to the branch:

  706ff17... Avoid some string copying
  76789fa... vala: Add missing TokeType cases for to_string()
  2d7df5c... field: Drop unused methods
  061d0e1... writer: Some string optimizations
  b552f38... ccodewriter: Use private _bol field instead of property
  44c6d06... Don't create constant Regex on demand and use static field