Fix sed expression due to changed LineBreak.txt file format

The file LineBreak.txt is automatically downloaded from the
following URL:

  http://unicode.org/Public/UNIDATA/LineBreak.txt

However the file firmat changed slightly since the 7.0.0 version;
it contains one or more spaces in front of the # (dash, comment)
character.

Therefore it was necessary to alter the SED expression to accept
such format:
 - add '+' character to accept one of more spaces.
Replace '+' with '{1,}' in Linebreak1.sed to make it BSD/OS X compatible
Merge pull request #6 from filodej/filodej/fix-linebreak-sed-epression

Fix sed expression due to changed LineBreak.txt file format