Pyexcel-xls

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**added**

. `pyexcel103 <https://github.com/pyexcel/pyexcel/issues/103>`_, include
LICENSE file in MANIFEST.in, meaning LICENSE file will appear in the released
tar ball.

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**Updated**

. put dependency on pyexcel-io 0.5.0, which uses cStringIO instead of StringIO.
Hence, there will be performance boost in handling files in memory.

**Removed**

. `18 <https://github.com/pyexcel/pyexcel-xlsx/issues/18>`_, is handled in
pyexcel-io

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**Updated**

. `18 <https://github.com/pyexcel/pyexcel-xlsx/issues/18>`_, handle unseekable
stream given by http response

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**Removed**

. Removed useless code

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**Updated**

. `14 <https://github.com/pyexcel/pyexcel-xlsx/issues/14>`_, close file handle
. pyexcel-io plugin interface now updated to use `lml
<https://github.com/chfw/lml>`_.

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**Updated**

. `18 <https://github.com/pyexcel/pyexcel-xls/issues/18>`_, pass on
encoding_override and others to xlrd.