Merge pull request #11 from gokits/add-context-version-for-waitsynced

add WaitSynced2 with Context param

Merge pull request #10 from YouHang/master

add yaml decoder

Merge pull request #9 from gokits/refactor

add global helper functions to simplify use of this package

1. fix deadloop when PreDecode/PostDecode/PostSwap failed

2. fix close nil chan panic

Merge pull request #1 from gokits/fix-reload-using-configmap

fix bug of file source when using k8s configmap

update stdlogger to v0.1.0

fix missing new file source options