initial build and run test command
convert a test project from mstest to xunit
Modify configure test project name to be conssitent with the rest common project which simplifies the script of invoke tests
wire up user external command to wire up myget feed setting
add xunit runner into repo
code cleaning up, add comments
Merge pull request #590 from yugangw-msft/EasyTest

Add facade commands of environment setup, build and runtest