removing entries from readme

These entries are not currently correct.
exposing PyIO to enable subclasses

Using this in a subclass to allow yaml-like-but-not-quite behavior
triggering travis
updating readme with travis info
updating url
adding coveralls shield
Update README.rst
removing align tags
adding rtd
adding keywords
updating coveralls shield entry

the current shield does not appear to work reliably for some reason
minor updates to doc formatting

80 column width limit
Crossplatform AssertTextFilesEqualTests
fixing test
new path_components algorithm
adding extra tests
minor test refactor
temporary test to see how ntpath behaves on linux
adding paths with spaces, just to be sure
switching to ntpath, as stackoverflow suggests