Handle SHY as described in http://www.unicode.org/reports/tr14/index.html#SoftHy

A DESCRIPTION OF THE REQUEST :
In http://www.unicode.org/reports/tr14/index.html#SoftHyphen the SHY character is described as in invisible glyph which indicates a position at which a line can be broken. (In this it differs from the ISO 8859-1 definition. See http://www.cs.tut.fi/~jkorpela/shy.html.)

At present, SHY is always a visible glyph.

JUSTIFICATION :
  To conform with http://www.unicode.org/reports/tr14/index.html#SoftHy

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
SHY was should be a zero-width character indicating a possible line break. In an intial implementation, SHY can simply be made visible as a HYPHEN-MINUS +U002D or HYPHEN +U2010 when it occurs immediately proceding a generated line break. TR14 discusses some of the subtltiesof the situation.
ACTUAL -
SHY is always visible.