Minor improvements (#5)

* folder build shoud be ignored

* added hint about gTTS support to get vernie chatter

* determines full path to vernie.commands

* catches tts exception if an empty text passed to `say` command

.gitignore

@@ -1,3 +1,4 @@
 .idea
 *.iml
-*.pyc
+*.pyc
+build

README.md

@@ -29,7 +29,9 @@ Demonstrational videos:
 
 ## Usage
 
-_Please note that it requires [gattlib](https://bitbucket.org/OscarAcena/pygattlib) to be installed, which is not supported on Windows._
+_Please note:_ 
+- _it requires [gattlib](https://bitbucket.org/OscarAcena/pygattlib) to be installed, which is not supported on Windows._
+- _to enable the text-to-speech functionality [gTTS](https://github.com/pndurette/gTTS) may be installed but is not required by default._
 
 Install library like this: 
 ```bash

examples/vernie/__init__.py

@@ -41,7 +41,8 @@ SPEECH_LANG_MAP = {
         "commands help": "Available commands are: "
                          "forward, backward, turn left, turn right, "
                          "head left, head right, head straight, shot and say",
-        "finished": "Thank you! Robot is now turning off"
+        "finished": "Thank you! Robot is now turning off",
+        "text is empty": "Please, enter not empty text to say!"
     },
     "ru": {
         "ready": "Робот Веернии готов к работе",
@@ -49,9 +50,10 @@ SPEECH_LANG_MAP = {
         "ok": "хорошо",
         "commands help": "Доступные команды это: вперёд, назад, влево, вправо, "
                          "голову влево, голову вправо, голову прямо, выстрел, скажи",
-        "Finished": "Робот завершает работу. Спасибо!",
+        "finished": "Робот завершает работу. Спасибо!",
         "commands from file": "Исполняю команды из файла",
         "fire": "Выстрел!",
+        "text is empty": "Пожалуйста, наберите не пустой текст!"
     }
 }
 
@@ -132,6 +134,9 @@ class Vernie(MoveHub):
                 confirm(cmd)
                 self.head(STRAIGHT)
         elif cmd[0] in ("say", "скажи", "сказать"):
+            if not cmd[1:]:
+                self.say("text is empty")
+                return
             say(' '.join(cmd[1:]))
         elif cmd[0] in ("fire", "shot", "огонь", "выстрел"):
             say("fire")

examples/vernie/run_commands_file.py

@@ -9,7 +9,7 @@ def confirmation(command):
     robot.say(command[0])
 
 
-with open("vernie.commands") as fhd:
+with open(os.path.join(os.path.dirname(__file__), "vernie.commands")) as fhd:
     for cmd in fhd.readlines():
         sys.stdout.write("%s" % cmd)
         robot.interpret_command(cmd, confirmation)