Version updates

Simple update of versions of Kotlin/gradle

Fix some bugs

Fix bugs to allow working without the idea plugin being present in the project. Also make bintray configuration optional to allow others to build.

v0.5.10

• Add the generated files to the standard clean task instead of using custom clean tasks.
• Some optimizations for configuration.
• Use Kotlin 1.1 to compile (but at source level 1.0)

v0.5.9

• Fix compatibility with jdk 7. Fix warnings.

0.5.8

• Much better diagnostics and error handling
• Instead of requiring the input to be realized immediately, it can be a
  Callable instead, that will be resolved if there is no doGenerate method
  that takes Callables. The result of the callable is used to resolve the
  actually invoked doGenerate method.
• Allow for absolute paths, by making sure not to resolve them against
  the base directory when they are absolute.

The multi-file release

Extend the system to do multi-file code generation, by configuring the generate task

Now also without kotlin

Fix the plugin to work without kotlin present.

Initial

** Note this release has a bug when not using the kotlin plugin. Use 0.5.1 instead. **

Initial release of functionality. In this release, generators can only use a single output file.