fix #197

___FAILURE_HALT___ is ignored as well as any panic/fail

fix #197
Merge branch 'master' of https://github.com/smartystreets/goconvey into fix_197

# By Michael Whatcott (3) and Martin Wernstål (1)
# Via Michael Whatcott
* 'master' of https://github.com/smartystreets/goconvey:
  Now using `:=` instead of `var` to declare test state.
  A few more test cases.
  Refactorings
  Every invocation of Convey() now replaces nested action instances to retain closed over variables from the specific invocations of the parent scopes
Merge pull request #198 from gisakulabs/fix_197

fix #197