Merge branch 'release/0.0.2'
Change to remove tempfile immediately

Tempfile remains local disk until fluentd process goes down or GC runs.
This may increase tempfile data size at local disk,  so change to remove
immediately.
Remove head slash of S3 path configure

If we put 'path' starts with '/', it uploads a file to empty name
directory. For example, we set path as '/path/log', S3 path will be
'//path/log/...'.

This commit wiil remove head slash if given.
Merge branch 's3_path' of git://github.com/adorechic/fluent-plugin-redshift into adorechic-s3_path
Add file_type 'hash'

Current file types require us to convert logs as csv, tsv, json strings
previous enqueue fluentd. But fluent plugins can get Hash object directlly
through msgpack. Especially in ruby, a cost to convert JSON is higher than msgpack
converting.

This commit add file type 'hash' to receive Hash log format.
I have to maintain another version of the out_redshift.rb file because I use more than the standard copy parameters. This makes it hard to upgrade.
It is easier to allow users to specify other copy parameters they use, using a td-agent configuration parameter.
Rename methods to be more "colorful"
Add top layer on msgpack data record
Rename new file_type to msgpack from hash
Rename copy option and add base copy option.
Merge branch 'adorechic-hash_type'
Add schema_name to redshift query
Add readme about schema setting
Change default schema to nil and finding table as search_path
v0.0.3
Merge branch 'master' of github.com:hapyrus/fluent-plugin-redshift into develop