Add update-icon-cache config option for makedistcheck
Remove non existing INSTALL file from EXTRA_DIST
Fix EXTRA_DIST gsettings variable
Add CLEANFILES to delete generated schema file
Make automake happy: INCLUDES->AM_CPPFLAGS
let 'make dist' create tar.gz and tar.xv tarballs
remove creating gz tarballs
Correct typo
Merge pull request #23 from infirit/1.6

Cherrypick usefull commits from master