0.3.0

• remove magic component installation and improve customisability (#8)
  • reorganise configuration -- removes SyntaxpainConfiguration but adds JavaSyntaxKit::setSyntaxColors for SyntaxStyle
  • remove some automatic setting of colours and fonts to clarify that implementors should be configuring them
  • allows offsetting LineNumbersRuler's numbers
  • greatly simplifies the code and removes some of that 20-year-old jank
• add syntax highlighting for 'record' keyword