support json and ndjson parsing

#30

Adapt pyexcel 0.5.0

see change log for details

adapt pyexcel v0.4.0

api changes in pyexcel-io v0.3.0

adapt pyexcel 0.3.0

As in subject

update json output

• serialize date and datetime
• support rownames

followup bug fix

fix #27

adapt pyexcel 0.2.2

see change log

Complete re-write

Added
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1. html support
2. support pyexcel 0.2.0's generator output
3. pypy and pypy3 in test targets
4. support file stream and dot notation, e.g. pyexcel.Sheet.rst will return rst text representation of it.

Updated
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1. #8, write_header as an option(False) to disable header writing
2. the json output of multiple sheet book will be sorted by its sheet names.
3. No longer, pyexcel-text is pyexcel-io plugin but pyexcel.sources plugin.

Fix setup.py

failed to install dependency due to #2

Maintenance release

Keep up with pyexcel-io updates to 0.1.0. It is backward compatible with previous releases and will not break your code.