Memory access modifications
Merge branch 'fluidity-core/MultiFluids_Dev' of github.com:jrper/MultiFluidFluidity into fluidity-core/MultiFluids_Dev
A collection of fixes to memory issues, especially when running with adaptivity.
Merge branch 'fluidity-core/MultiFluids_Dev' of github.com:jrper/MultiFluidFluidity into fluidity-core/MultiFluids_Dev