Updating README.md with project information

Add information about the project, such as how to build, how to get the
source code. Mention what coding style we follow, what platforms has
been used etc.
Merge pull request #2 from jbech-linaro/update_readme_md_20140605

Updating README.md with project information
Fix confusing comment

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Adding license default
Merge pull request #7 from pascal-brand-st-dev/issue/add_license_terms

Adding license default
Update Notice.md accordingly to optee_os license terms

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Merge pull request #8 from pascal-brand-st-dev/issue/update_notice

Update Notice.md accordingly to optee_os license terms