Added write_ado to cscript.
Added .gitignore for smcl2md.ado.
write_ado preserves final -end-.
Added test of {smcl}.
Added test of {bf}.
Class `SmclSyntax' encapsulates SMCL syntax types.
Renamed SmclSyntax.mata as SmclDirec.mata before defining new class.
Class `SmclDirec' encapsulates a SMCL directive.
Merge branch 'SmclDirec' into smcl2md
Swapped `SmclTokens'.tokens() and .braces().
Added `SmclTokens'.brace_offset().
`SmclStateSwitch' encapsulates an on/off switch of the SMCL environment.
`SmclState' is implemented using assoc. array of SMCL switches.
Added `SmclState'.display().
Added `SmclState'.reset_from() for managing nested SMCL environments.
Added `SmclState'.copy().
Assoc. array keys are colvectors, not rowvectors.
Merge branch 'SmclStateSwitch' into smcl2md
`SmclTokens'.subset() strictly checks index i.
Added -smcl_to_md()-.

-write_md()- uses it to convert individual SMCL lines.