[35/39] SAMZA-259: Restructure documentation folders

[yanfang]

http://git-wip-us.apache.org/repos/asf/incubator-samza/blob/1e2cfe22/docs/img/0.7.0/learn/documentation/container/stream_job_and_db.png
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diff --git a/docs/img/0.7.0/learn/documentation/container/stream_job_and_db.png 
b/docs/img/0.7.0/learn/documentation/container/stream_job_and_db.png
deleted file mode 100644
index 8ad0af3..0000000
Binary files 
a/docs/img/0.7.0/learn/documentation/container/stream_job_and_db.png and 
/dev/null differ