Made lda plugin properly refer to the main script as 'main script' and not the basename of the sieve file (which is of no interest to the user for the main script).

Added the concept of a script code header to list the extensions actually used by a script (was using all extensions listed in the binary).

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

Further developed the include extension to compile included scripts in additional blocks of the binary.

Properly implemented the code dumper. Dumps are now printed in a stream. The individual opcode and operand implementations no longer use printf()s.

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

Grouped runtime parameters into a single runtime environment and started implementation of result composition/execution.