Merge pull request #131 from v3knet/hotfix/config-fetcher

Config: Let other module can use helper.config_fetcher natively.
Merge pull request #132 from v3knet/render/support-content-key

helper.content_render: Render $data[‘content’] as same as $data[‘template_string']
Fix #136: PEAR install no longer worked. Try composer.
Fix #134 by quyenbui: Support block attachment for entity template.
Merge branch 'dev-master' of github.com:v3knet/at_base into dev-master

* 'dev-master' of github.com:v3knet/at_base:
  Fix #136: PEAR install no longer worked. Try composer.