Merge branch 'master' of https://github.com/Drotth/DA170A-labs
Restarted working on lab5, a bit working
more work with lab5
A wee more added to lab5
Some code working, some code borken
Small changes to lab5
Lab5 still not working. Gets an error while deletig pointer
Merge branch 'master' of https://github.com/Drotth/DA170A-labs
Rewritten most of the code in lab5

All code in string.h has been rewritten, mostly modified from earliter commit. However now uses deep copy. All tests in main.cpp working except operator+.
Now operator+ is also working
Merge branch 'master' into mattias2
Merge branch 'mattias2'