re #91 : Set whence defaul to SEEK_SET
re #91 : Only escape if passed a string. Do not double escape.
re #91 : Add template functions

- json => json_encode
- format => sprintf
- replace => strtr
re #91 : Code cleanup
re #91 : Add KObjectConfigPhp
re #91 : Allow to set the yaml encoder and decoder

- Add ObjectConfigYaml::setDecoder()
- Add ObjectConfigYaml::setEncoder()
Code cleanup