Remove last reference to boost in dali-core

Remove last reference to boost in dali-core

Removed boost::function declared in property-notifcation-declarations.h
which was being included by handle.h, which is include by
most of DALi. The boost function.hpp header was pulling in a
total of 179 other boost header files.

Some files using strcmp, memcpy and memmove no longer compiled after the
removal, so they now include <cstring> which has the API for those functions.

On an i7 with make -j8 dali-core now compiles 20% faster

Change-Id: Ic03c1efaa3f234b3777a4828b6c5e8e28bf1ff75