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Merge pull request #1 from Yoshinaka/na_921

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Defined basic methods
Defined basic methods for gpio library
Add scripts search tweets with a keyword.
Delete useless Task.py
Merge pull request #2 from Vermee81/main_thread

Main thread
Merge branch 'gpio' into develop
Merge branch 'main_thread' into develop
Made an sample script using thread.
Merge branch 'tweets' into develop
Add a fuel class
Receiving time from fuel class
Implement Raspberry Pi's GPIO command
Merge branch 'gpio' into develop
Make add a function to make fuel variable thread safe.
Add a simple test for fuel class
Merge branch 'develop' of https://github.com/Yoshinaka/nama_phone_engine into develop
add twitter
Merge pull request #5 from Yoshinaka/develop

Use ConfigParser and config file to store keys for oauth2 authentication.