test: Remove configuration specific values from mutex test
GC: Replace hand calulated offsets with compiler calculations.
Fix documentation of &clock and &dateline.
Remove the duplication of icall.h
Correct typos in the language reference section of the book.
Fix ivib to cope with changes in commit 7d4093ae.
Add a -printAST option to the compiler
tests: Disable the one FxPt test that crashes; enable the rest.