adaptivex 0.0.1+4

This package allow you to build the widget based on width (screen) size or platform

0.0.1+4

• add .isXSS, .isXSM, .isXs, .isSm, .isXL, .isXLL, .isXLM to context

0.0.1+3

• update comment doc
• add linux adaptive example

0.0.1+2

• tested passed all,
• DeviceService class
• use targetPlatform instead of io to detect device

0.0.1+1

• format and log

0.0.1

• AdaptivePlatformWidget
• AdaptiveBuilder