Release for tensorflow 1.6 and Spark 2.3

Bump version to 0.2.9 (#128)

Update version numbers from 0.2.8 to 0.2.9rc-0

updating readme (#102)

[95] Properly adds the shapes of the tensors to the graph. (#98)

* support for strings

* removing type tags, they do not work with scala 2.10

* removing type tags, they do not work with scala 2.10

* removing type tags, they do not work with scala 2.10

* revert scala changes

* revert scala changes

* revert scala changes

update readme