[PATCHv7.4 0/4] Gitweb caching v7.2

This series is a bit fixed up and a tiny bit cleaned up version of
"Gitweb caching v7" series from John 'Warthog9' Hawley:
  http://thread.gmane.org/gmane.comp.version-control.git/160147

This version of this series is based on top of 'master'

Compared to initial v7.1 fixup of "Gitweb caching v7" series it
contains fix to "gitweb: Prepare for splitting gitweb" preventing
installation and fix to "gitweb: File based caching layer (from
git.kernel.org)" that generated problems with t9501 test, as noticed
by Thomas Rast in
  http://article.gmane.org/gmane.comp.version-control.git/162787
  http://marc.info/?l=git&m=129137257619613&w=2

It also includes trivial fixup in "gitweb: Minimal testing of gitweb caching"... but still those new tests don't pass, at least for me. John Hawley is (according to information from #git IRC channel) is working on "Gitweb caching v8"; I hope that it is fixed there.

Shortlog:
~~~~~~~~~
Jakub Narebski (2):
  gitweb: Prepare for splitting gitweb
  gitweb: Minimal testing of gitweb caching

John 'Warthog9' Hawley (2):
  gitweb: add output buffering and associated functions
  gitweb: File based caching layer (from git.kernel.org)

Table of contents:
~~~~~~~~~~~~~~~~~~
 [PATCHv7.4 1/4] gitweb: Prepare for splitting gitweb
 [PATCHv7.4 2/4] gitweb: add output buffering and associated functions
 [PATCHv7.4 3/4] gitweb: File based caching layer (from git.kernel.org)
 [PATCHv7.4 4/4] gitweb: Minimal testing of gitweb caching

Diffstat:
~~~~~~~~~
 gitweb/Makefile                           |   21 ++-
 gitweb/gitweb.perl                        |  136 +++++++++++-
 gitweb/lib/cache.pl                       |  348 +++++++++++++++++++++++++++++
 gitweb/static/gitweb.css                  |    6 +
 t/gitweb-lib.sh                           |   15 ++
 t/t9500-gitweb-standalone-no-errors.sh    |   20 ++
 t/t9501-gitweb-standalone-http-status.sh  |   13 +
 t/t9502-gitweb-standalone-parse-output.sh |   33 +++
 8 files changed, 581 insertions(+), 11 deletions(-)
 create mode 100644 gitweb/lib/cache.pl