0.3.0 release

refactor getScreenSize() (#18)

- fix missing 0 in normal (#19, Kudos to d0m1n1qu3)
- fix basic escape strings write length (normal, bold etc  eating one char).
- add **getScreenSize()** (#16, Kudos to chlordk)
- add **readCursorPosition()** (#16, Kudos to chlordk)
- add example, (#16, Kudos to chlordk)
- add **screenWidth()** call getScreenSize() before use
- add **screenHeight()** call getScreenSize() before use
- refactor **deviceType()** size.
- add **blinkFast()**
- update readme.md
- update keywords.txt