Merge branch 'maint'

* maint:
  Prepare for v3.1.8
  Use C89-style comments
  Add quicktest Makefile target

Conflicts:
	AUTHORS.txt
	Makefile.in
	test/test_hashutil.c

AUTHORS.txt

@@ -13,6 +13,7 @@ ccache is a collective work with contributions from many people, including:
 * Bo Rydberg <bolry@hotmail.com>
 * Chris AtLee <chris@atlee.ca>
 * Clemens Rabe <crabe@gmx.de>
+* Eric Blau <Eric.Blau@tekelec.com>
 * Francois Marier <francois@debian.org>
 * Joel Rosdahl <joel@rosdahl.net>
 * John Coiner <john.coiner@amd.com>
@@ -20,10 +21,13 @@ ccache is a collective work with contributions from many people, including:
 * Justin Lebar <justin.lebar@gmail.com>
 * Karl Chen <quarl@cs.berkeley.edu>
 * Kovarththanan Rajaratnam <kovarththanan.rajaratnam@gmail.com>
+* Lalit Chhabra <lchhabra@linuxmail.org>
 * Lars Gustäbel <lars@gustaebel.de>
+* Lubos Lunak <l.lunak@suse.cz>
 * Mark Starovoytov <starovoytov.mark@googlemail.com>
 * Martin Pool <mbp@sourcefrog.net>
 * Owen Mann <owen@mann.org>
+* Patrick von Reth <vonreth@kde.org>
 * Paul Griffith <paulg@cse.yorku.ca>
 * RW <fbsd06@mlists.homeunix.com>
 * Ramiro Polla <ramiro.polla@gmail.com>

NEWS.txt

@@ -2,6 +2,39 @@ ccache news
 ===========
 
 
+ccache 3.1.8
+------------
+Release date: 2012-08-11
+
+
+New features and improvements
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    - Made paths to dependency files relative in order to increase cache hits.
+    - Added work-around to make ccache work with buggy GCC 4.1 when creating a
+      pre-compiled header.
+    - Clang plugins are now hashed to catch plugin upgrades.
+
+
+Bug fixes
+~~~~~~~~~
+
+    - Fixed crash when the current working directory has been removed.
+    - Fixed crash when stderr is closed.
+    - Corrected a corner case when parsing backslash escapes in string
+      literals.
+    - Paths are now correctly canonicalized when computing paths relative to
+      the base directory.
+
+
+Other
+~~~~~
+
+    - Made git version macro work when compiling outside of the source
+      directory.
+    - Fixed `static_assert` macro definition clash with GCC 4.7.
+
+
 ccache 3.1.7
 ------------
 Release date: 2012-01-08