Normalize variable names, add maxLines

[eat-sleep-code]

• Change variable names to camelCase for consistency.
  • Left Id as Pascal case as id appears to be reserved.
  • This is a breaking change so would require documentation to be updated
  • partial_update is now partialUpdate

  • font_path is now fontPath

• Added ability to specify maximum lines

  • This is useful, especially in textpos.py, as you can display X lines and then position some other text below.

• Removed preceding space on subsequent lines
  • A space was being prepended at the beginning of the 2nd, 3rd, 4th, etc. lines resulting them being slightly indented. This is resolved.

[tvoverbeek]

Looks good to me. Thanks for taking the time to make variable naming consistent. Also removing the leading space on auto-wrapped lines is OK. Adding the maxLines feature gives better control of the screen layout. Merged