Made deprecated notify extension implementation compatible with cmusieve, except for the denotify command.

Enforced limits on string length and handled the finite nature of integers for number parsing and the construction of the AST.

Significantly improved handling of old/corrupt binaries and revised matching implementation in the process.

Introduced the concept of a sieve object to merge the coding of comparators, match types, address parts and other objects that might need to be represented in byte code (removes lots of code duplication).

Made error reporting cleaner by avoiding the scriptname of the main script and indicating that the printed numbers are in fact source code lines.

RECOVERED FROM INCONSISTENCY: developed testsuite and binary dumping and fixed various small issues.

Exported sieve-code-dumper from sieve-interpreter containing all code dumping related implementation. Now to remove all printfs....