patch improve_tests_cmd_line

add version & help options

Add circle-ci badge to readme

Import fix, winston logger, intro message

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 - remix-debug@0.2.8
 - remix-lib@0.3.7
 - remix-solidity@0.2.7
 - remix-analyzer@0.2.7
 - remix-tests@0.0.10

Fix: returning from a call without result

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 - remix-debug@0.2.7
 - remix-lib@0.3.6
 - remix-solidity@0.2.6
 - remix-analyzer@0.2.6
 - remix-tests@0.0.9

Add serializeInputs function helper

Check if `navigator` available

Electron fixes

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