Integrate valgrind to .travis.yml
Update .travis.yml
Amend fix of yml syntax error
Update .travis.yml
Update .gitignore
Merge branch 'develop'
Merge branch 'arakiken-sandbox' into develop
Bump version
Merge branch 'release-0.18' into develop
Merge branch 'develop' into release-0.18
Rebuild configure script
Merge branch 'release-0.18'
Merge branch 'master' into travis-valgrind-integration

Conflicts:
	.travis.yml
Check memory leaks and access violation only when WINE is not used
Add --prefix=/usr to configure option in travis script
Fix travis test with using wine
Merge branch 'travis-valgrind-integration' into travis
Merge branch 'sandbox' into gd-integration
Cleanup
Change configure options:
--enable-gdk-pixbuf to --with-gdk-pixbuf
--enable-libcurl to --with-libcurl