#80 Update usage information of dbgen

Fixes #80
#81 Generate initializers for non-reference types

Also fixed an inconsistency in the core that surfaced because of the
code generation.

Fixes #81
#81 Fixed uninitialized readonly values
#81 Add memset 0

A db_initValue not always initializes everything to zero - which I
didn’t realize. Added a memset that sets everything to zero.
Merge branch 'master' into jleeothon
Changed fprintf to db_error
Changed free for db_dealloc
#16 Included the parsing script in all HTML files (rel. path)