support situations where different directories need different options,
kdesvn-build will search in the following order:
1. ./kdesvn-buildrc (Note that it's not a hidden file)
2. ~/.kdesvn-buildrc
3. Internal option set.
Also, I fixed the behavior of kdesvn-build when trying to open a non-existant
file, it will now use the default options if the file doesn't exist, not just
when the file exists but is invalid.
Christian Tibirna provided an initial patch, thanks!
CCMAIL:tibirna@kde.org
svn path=/trunk/KDE/kdesdk/scripts/kdesvn-build; revision=415953