Formalise using semantic versioning (semver). The prior version (1.4.0) introduced API changes that were incompatible: future versions will follow semver to prevent confusion.
Adds some missing template files to the share directory.
Fix how links in -tterm have their ANSI escapes closed out.
Lastly, to address downstream breakage when using nested Mac OS X sandboxes, a special argument SANDBOX_INIT_ERROR_IGNORE value may be passed during the make build sequence. If set to always, errors from the underlying Mac OS X sandbox are always ignored. If set to any other value, the user must set the environment variable SANDBOX_INIT_ERROR_IGNORE to ignore these errors. This is only relevant to Mac OS X builds with the sandbox feature enabled during configuration.