DOC: new branch guidelines
DOC: include suggestions by keszybz
DOC: include link suggestions by Debilski
Merge pull request #72 from esc/feature/new_branch_guidelines

DOC: new branch guidelines
DOC: remove possibly redundent import statements in examples
DOC: add a note about needed imports
Merge pull request #76 from esc/fix_example_imports

DOC: Fix example imports
BF: St. Andrews was last year, Kiel is now
DOC: Typos.
DOC/BF: Solving some issues with ReST headings.
Merge pull request #78 from Debilski/master

Minor typo fixes.
BF/RF: TestPlayer now copies the list automatically.
BF: Noiser should not fail when a_star does not find a connection.
Merge pull request #84 from Debilski/fix/noiser-failure

BF: Noiser should not fail when a_star does not find a connection.
RF: game_master can keep round index in the state

This frees the callers from having to calculate round index by hand.
RF: remove index parameter completely
Code simplification in game_master
BF: fix error in BasicDefensePalyer
BF: fix stop_tracking_0 in BasicDefensePalyer
DOC: be explicit about why we need to check for None