Version 0.4.0

Release Notes

• Implement Kilopascal and Megapascal and write tests (#29) e1bc33c (@arubacao)
• remove composer.lock from repo and add it to .gitignore (#30) 37e0f01 (@arubacao)
• Fix: add missing self conversions for temperature units (#31) 380bdb7
• Feature/improve travis file (#32) 707fb0a (@arubacao)
• Adding energy units (#33) 0860032 (@andrewboerema)
• Added millibar as pressure unit (#34) 9a6eed0 (@teunw)
• Added time measurements (#35) 611293e (@teunw)
• Feat: add simple contributing guide for now (#36) cd71bbc
• Added last weight measures (#37) dc7021e (@teunw)
• Add first set of dev docs (#44) ca74697
• scientificSymbol property, getter and setter are added (#47) 19837f1 (@luchianenco)
• Upgrade: docs & composer version 7c553ad
• Fix: Energy integration test - wrong unit case for Joule 708f021