Updated .gitignore to skip build files

Signed-off-by: arthurrichards77 <aeagr@IT051727.users.bris.ac.uk>
Updated abstract

Signed-off-by: arthurrichards77 <aeagr@IT051727.users.bris.ac.uk>
Updated introduction.

Haven't quite finished - need to finish the outline of approach.

Signed-off-by: arthurrichards77 <aeagr@IT051727.users.bris.ac.uk>