added apr-util headers too
updated libapr.a built with -fPIC

otherwise nupic code fails
final a. rebuild

apr-1.4.8:
./configure 'CFLAGS=-fPIC -g -O2 -pthread' 'CXXFLAGS=-fPIC -g -O2 -pthread' --enable-static --enable-threads
make
ar -rcs libapr-1.a `find . -name "*.o"`

apr-util-1.5.2:
./configure 'CFLAGS=-fPIC -g -O2 -pthread' 'CXXFLAGS=-fPIC -g -O2 -pthread' --with-mysql --with-apr=../apr-1.4.8/
make
ar -rcs libaprutil-1.a `find . -name "*.o"`
Merge branch 'update-apr' of https://github.com/breznak/nupic into update-apr