Merge pull request #6 from wush978/master

resolve #2
Pulled down update to R_ETL
update DESCRIPTION
Merge pull request #8 from ntuaha/master

Pulled down update to R_ETL
update installation tips
Merge pull request #10 from wush978/hotfix/readme

update installation tips
[debug] wrong path of index
debug: syntax error
Merge pull request #11 from wush978/hotfix/readme

[debug] wrong path of index
Merge remote-tracking branch 'twruser/master'

Conflicts:
	DESCRIPTION