Split Coord and Chain to their own file
split the tests as well
Added tests for Chains
Fixed the StrBuf -> String issue
Fixed the way chains are handled. They work now.
Merge pull request #8 from TisButMe/split-board-file

Split Coord and Chain to their own file
Merge pull request #9 from TisButMe/improve-chains-handling

Improve chains handling
Merge branch 'master' into sgf

Conflicts:
	src/board/mod.rs
	src/iomrascalai.rs