90aca9 Update transformations.sed file to support the `Convenction'

Authored and Committed by areguera 14 years ago
    Update transformations.sed file to support the `Convenction'
    admonition. Convenction admonition uses icon-admonition-ruler icon.
    Convenction admonition is built with the following texinfo
    construction:
    
        @quotation
        @strong{Convenction} Describe the convenction here.
        @end quotation