remind myself to push tags
require version 1.3 for building ninja itself

This catches the case where you use an older version on Ninja
to build a newer version of the Ninja code.
bootstrap.py always should work regardless.
fix truncate compile error in ninja_test on windows
Merge pull request #573 from sgraham/truncate-win

fix truncate compile error in ninja_test on windows
version 1.3.1