Update readme for travis build-status locations.
Merge from stable for failing test
Tiny documentation improvements (most importantly: a usage example).
Protect against sequences of -/+ tokens, e.g. "a - -b" or "a + ++b". Solves issue #9.
Test for file ending in a string with no final newline.
Fix behaviour when file ends in a string with no final newline.
Bump version for release.
Added note pointing to the Travis test page in readme.
Fix non-standard reStructuredText that breaks bitbucket and pypi renderer :-(
More attempts to fix broken ReST
Moved README so bitbucket realises it's ReST

--HG--
rename : README.txt => README.rst
Turns out pypi *does* support code:: directive.
Merge released version from default

--HG--
branch : stable