Merge pull request #12 from KeithYokoma/master

Master
Introduce debugging input/output stream
Add application utils for debug mode check
Add sip to pixel conversion
Annotate license on source
Fix travis build script
Add utility for intent
Add application installation location checker
Add app widget utility
Add contacts contract utility
Distribute 0.2.3
Merge branch 'master' into develop
Add application installation checker utility