Restructuring files in project

Details:

* move main files into the top of the tree;
* move examples into examples folder;
* support new structure in run_test.sh and setup.py.

Result:

* update gitignore files to support run_test.sh;
* compatibility with openstack-gates;
* compatibility with standard pip installation via git+https.

Closes-Bug: #1479785

Change-Id: I93b51b0797eaf619614cb2a493a2a68d0f547751

.gitignore

@@ -5,5 +5,8 @@
 .idea
 .venv
 .build
+build
+dist
+fpb_venv
 *.rpm
 *.deb