Add a initial version of Section 3.1,3.2,3.4
- Merged initial draft of sections 3.1,3.2,3.4
- Removed .DS_Store and updated .gitignore accordingly
Add (still quite unfinished) section 3.3
Small fix (Section 3.1, etc.)
Some fix
Merge branch 'master' of github.com:moolee/bdghv
Merge et correction