- implemented i_t1_has_chars(), tests for same

    - implemented i_t1_has_chars(), tests for same
        - added ExistenceTest.{pfb,afm,ttf} for testing $font->has_chars
        - tests for Imager::Font::Type1::has_chars();
        - tests for Imager::Font::Truetype::has_chars();
        - internal and external bounding box calculations now use
          the same hint flags as text output for Freetype 2.x
        - made the i_foo_bbox() interface more expandable by using
          symbolic constants for the sizes and array offsets
        - added a / character to the ExistenceTest.foo fonts that
          overlaps the right side of the character cell, to test the
          advance width reporting.
        - added advance width to the i_foo_bbox() interface, and
          implemented it for FT2, FT1 and Type 1
        - Imager::Font::bounding_box() now returns an Imager::Font::BBox
          object in scalar context.
        - implemented $font->align() text output method, for simple output
          of aligned text
        - created Imager::Font::Wrap::wrap_text to perform simple text
          wrapping
        - FT1, FT2 and T1 fonts now support the face_name method
        - FT1, FT2 and T1 now support the glyph_names() method