edit GitLab license info in regards to CC licensing

GitHub uses a library called Licensee to identify a project's license
type. It shows this information in the status bar and via the API if it
can unambiguously identify the license.

This commit moves the reference to Creative Commons licensing from
the LICENSE file to the README, which allows Licensee to successfully
identify the license type of GitLab CE as MIT.
Signed-off-by: Andrea Kao <eirinikos@gmail.com>

LICENSE

@@ -5,8 +5,3 @@ Permission is hereby granted, free of charge, to any person obtaining a copy of
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
-
----
-
-All Documentation content that resides under the doc/ directory of this
-repository is licensed under Creative Commons: CC BY-SA 4.0.

README.md

@@ -73,6 +73,8 @@ GitLab Community Edition (CE) is available freely under the MIT Expat license.
 
 All third party components incorporated into the GitLab Software are licensed under the original license provided by the owner of the applicable component.
 
+All Documentation content that resides under the doc/ directory of this repository is licensed under Creative Commons: CC BY-SA 4.0.
+
 ## Install a development environment
 
 To work on GitLab itself, we recommend setting up your development environment with [the GitLab Development Kit](https://gitlab.com/gitlab-org/gitlab-development-kit).