release-0.9.5

This release bundles together a bunch of fixes and updates, primarily aimed at improving the error handling. As this is the first release in some time the changelog here is a little abbreviated.

New features:

• Support was added for switch and case
  • Implemented in #71, reported in #70.
• Added explicit support for the null token.
  • Implemented in #83.
• Support was added for regular expression capture groups.
  • Implemented in #69, reported in #68.

Improvements:

• The addition of fuzz-testing, to help catch errors.
  • Implemented in #101, reported in #99
• The range operator (..) allows descending ranges as well as ascending
  • Implemented in #100, reported in #98
• The context supplied to the evaluator is no longer dropped and lost when handing (internal) recursion.
  • Implemented in #96, reported in #93.
• Iteration over hash-keys returns things in a consistent order
  • Implemented in #91, reported in #90.
• The new golang toolchain allows embedded files to be handled, without the use of an external build tool.
  • This was used to handle our standard library, in #73 .

Bugfixes:

• Malformed regular expressions are caught and reported.
  • Implemented in #95, reported in #94.
• Nested if/else if/else support was improved in #82.