* New: API Documents
* New: src/tests files.
* New: shellscript for build document.
* New: shellscript for build app.
Add 'requirements.txt'
Create 'How to build'
Create 'how_to_use.rst'.
Merge pull request #1 from sbkro/feature-doc

Feature doc
Display usage when error occured.
Merge pull request #2 from sbkro/feature-error-display

Display usage when error occured.
Add icons.
Update README.md. Add link to project page and special thanks.
Merge pull request #3 from sbkro/feature-disp-image

Feature disp image
Add alc.alfredworkflow.
Merge pull request #5 from sbkro/develop

Develop