Reimplement compilers using simpler parser generator

[vbmacher]

Current implementation using Java Cup and Jflex is very cumbersome, they are not developed, and they need runtime support.

What I'm looking for is:

• easy integration with RSyntaxTextArea
• no runtime needed
• simplicity of development
• speed of parsing

[vbmacher]

JavaCC:

• (-) doesn't seem to be developed, just maintained
• (+) doesn't need a runtime
• (+) parser+lexer in one tool
• (-) what the heck is JJTree? seems complex

[vbmacher]

ANTLR:

• (+) actively developed
• (+) parser+lexer in one tool or separated
• (+) they claim AST support is there
• (-) needs a runtime

[vbmacher]

It seems RSyntaxTextArea would like to support ANTLR natively: bobbylight/RSyntaxTextArea#221

[vbmacher]

SSEM compiler or SSEM memory / decoder or whatever combination does something wrong.
BINS and BNUMs are wrongly interpreted by decoder.