[DPL] Value separeted output reader

[DPL] Value separeted output reader

[Issue#]   LINUXWRT-639
[Problem]  VS reader for command output.
[Cause]    N/A
[Solution] Generlized value separted reader

[Remarks]
    This is parser for files containing lines with values seperated with custom
    charaters.  Purpose of this is to parse output similar to csv and hide (no
    need for rewriting) buffers, reads, code errors. Result is two dimensional
    array. See previous change.

    Parser is designed as class configured with policies classes:
    - http://en.wikipedia.org/wiki/Policy-based_design

[Verification]
    - Build with tests and WTIH_CHILD ON.
    - $> wrt-commons-tests-test --output=text --regexp='ValueSeparatedReader_'

Change-Id: I7dba345e370767cd3465921ed4f212920488b6e4