Improve log format

Author: stsewd

readthedocs/restapi/templates/restapi/log.txt

@@ -1,10 +1,11 @@
-RTD build information
-Build: {{ build.id }}
-Project: {{ build.project }}
-Version: {{ build.commit }}
+Read the Docs build information
+Build id: {{ build.id }}
+Project: {{ build.project_slug }}
+Version: {{ build.version_slug }}
+Commit: {{ build.commit }}
 Date: {{ build.date }}
 State: {{ build.state }}
-{% if build.state == 'finished' %}Success: {{ build.success }}{% endif %}
+Success: {% if build.state == 'finished' %}{{ build.success }}{% else %}Unknown{% endif %}
 
 {% for command in build.commands %}
 [rtd-command-info] start-time: {{ command.start_time }}, end-time: {{ command.end_time }}, duration: {{ command.run_time }}, exit-code: {{ command.exit_code }}