Implement
Write test
Implement a single pipe executor 'dpmanip'
Complete implementation (not fully tested)
fixed jquery-cookie link
Add requirement
Add option --debug
Add sample usage
Enable keyword specification for each pipes
Revise exception raising
Merge pull request #103.
Refine code.
Merge pull request #106 from xeno1991/fix_jquery_link

fixed jquery-cookie link
Revise command-line argument
Merge pull request #107 from termoshtt/dpmanip

Add dpmanip.
Merge pull request #108 from termoshtt/revise_addcomment

Revise exception raising in addcomment pipe
Fix bug in keyword specification
Add nodes.node_types
Implement some filtering functions (not tested and documented)
Implement show pipes (not tested and documented)