Update README.md

Fixing readme problems.
Updated build instructions
Merge branch 'dev'
Added the report to GIT

Moved from the Dropbox
Report structure + reworked workflow
Added todo package
minor changes to background
background and introduction
Added section on API
Merging conflicts
ER_diagram.tex
giraf architecture added
Merge branch 'master' of https://github.com/Ezphares/giraf_database
figures for architecture added
Moved common chapter, started adding structure
Added more report structure.
increased text size on figures
edited headline
sprints descriptions

will be changed for something more readable.
Easier overview of sprints.