Quote INSTALLMAKEFLAGS to permit setting via environment variable
Don't INSTALLMAKEFLAGS=""; allow setting from the environment
Ignore rm error in doc build
Edit 'make clean' to also remove src/*.dll (Windows shared library).
Clean old builds before we do cran-build
Modify .svnignore files. WLS branch and trunk changes. Added continuous only wls test. Found and added state space algebra test.
Run roxygen prior to building docs
Fixup doc build
Do a slightly better job with 'make clean'