Updated misc and isuth-modules in tex/latex

  * misc/vectors.sty: added new 'style' to use when making bold vectors,
    tested with CM and Euler fonts, still lack documentation;
  * isuth-modules:
    - asymptote.dcf: comment use of 'pscyr' package (need other way to
      switch it on or off), use 'H' style for vectors;
    - org-preview.dcf: increased version, added note to provide
      documentation;
    - org.dcf: increased version, use 'H' style for vector macro
      '\vect', corrected misspelled module 'math-crts', added note to
      provide documentation.

Signed-off-by: Vladimir Lomov <lomov.vl@gmail.com>