Multiconfig: enable embedded struct
Multiconfig: add tests for JSON reader related with embedded structs
Multiconfig: pass default value as a function parameter
Multiconfig: comment-out test
Multiconfig: unify test structure
Multiconfig: add todo and return error
Multiconfig: add tests for reading from env variables
Multiconfig: add embedded struct support
Merge branch 'master' of github.com:koding/multiconfig into nestedstruct
Multiconfig: add nested struct support for flag set
Multiconfig: add support for reading config from flag set
Multiconfig: change functions to methods
Multiconfig: generate environment variable names recursively
Merge branch 'nestedstruct' of github.com:koding/multiconfig into nestedstruct

Conflicts:
	env.go
Merge pull request #5 from koding/nestedstruct

Added NestedStruct support [fixes #1]