* SConstruct: Further development.

* input/test/SConscript:
* input/template/SConscript:
* input/regression/SConscript:
* Documentation/bibliography/SConscript:
* Documentation/bibliography/index.html.in: New file.

* Documentation/bibliography/GNUmakefile (local-WWW): Remove index
generation.

* buildscripts/builder.py: Add new builders.

* make/stepmake.make:
* stepmake/stepmake/*.make:
* configure.in:
* lily/*:
* flower*: Use config.hh (Was config.h).

* scm/encoding.scm (get-coding): Print friendly error message when
no encoding is found, rather than crashing.