remove yaml-cpp build files

provide the libyaml.a without the source files (as other libs)
fix warning: unused variable size_
update yaml-cpp headers to 0.3

libyaml.a has to be rebuilt to this version too
yaml-cpp 0.3 : implement API changes

see http://code.google.com/p/yaml-cpp/wiki/BreakingChanges
enable check (was blocked by nupic 1.x Nodes)
provide compiled static lib libyaml.a ver 0.3

with -fPIC
Revert "enable check (was blocked by nupic 1.x Nodes)"

This reverts commit 6fcb8926d85b71267175decaf966e90d3f74b191.
causing some problems now, investigate later
name private functions _
yaml-cpp: partially revert : API - use Read()
Merge branch 'master' into yaml-cpp
Merge branch 'master' into yaml-cpp
built and update libyaml-cpp.a to ver0.3 for linux 32bit
Merge branch 'yaml-cpp' of https://github.com/breznak/nupic into yaml-cpp
Merge branch 'master' into yaml-cpp
Merge pull request #301 from breznak/yaml-cpp

Yaml cpp update to 0.3
Updates libyaml to 0.3 per numenta/nupic#337
Merge pull request #339 from oxtopus/yaml-cpp-darwin64

Updates libyaml to 0.3 per numenta/nupic#337
Merge branch 'master' into david-master
Merge branch 'master' of github.com:DavidRagazzi/nupic into david-master