Move resources inside lessons.
WIP [Lesson 03] Embed image in markdown cells.
[Lesson 01] Just run the notebook for test.
[Lesson 02] Modify text in raw text cell at the end.
[Lesson 03] Embed images. Raw text cell explaining about notebook style.
[Lesson 04] Add raw text cell explaining notebook style.
[Lesson 05] Embed images. Add raw text cell explaining notebook style.
[Lesson 06] Add raw text cell explaining notebook style.
[Lesson 07] Add raw text cell explaining notebook style.
[Lesson 08] Add raw text cell explaining notebook style.
[Lesson 09] Add raw text cell explaining notebook style.
[Lesson 10] Embed images. Add raw text cell explaining notebook style.
[Lesson 11] Embed images. Change location of airfoil file. Add raw text cell explaining notebook style.
Merge pull request #6 from barbagroup/embed_static_images

Embed static images