tfautograph (development version)

Fixed an error where autograph({expr}) would error when exporting undef active binding symbols.
for in an eager autograph() context gains the ability to process arbitrary python iterables, including tf.distribute.DistributedDataset.
for now automatically infers the variables of nested for loops as loop vars.
Improved error message when a break or next is signaled as a graph node but the intended loop is being evaluated eagerly.

tfautograph 0.3.2

Added back compatibility with R-3.3 and R-3.4

tfautograph 0.3.1

Fixed issue that prevented the package from being loaded by devtools::load_all()

tfautograph 0.3.0

Improved handling of shape_invariants supplied to ag_while_opts. A named list of user variable shapes can be passed directly now, without requiring users to manually specify shapes of internal loop tracking tensors.
Deprecated back_prop arg in ag_while_opts()
Move 'tensorflow' package from 'Imports' to 'Suggests' to avoid circular dependency.
Added a NEWS.md file to track changes to the package.