Pyexcel-htmlr

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**Updated**

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**updated**

. pyexcel `pyexcel105 <https://github.com/pyexcel/pyexcel/issues/105>`_,
remove gease from setup_requires, introduced by 0.5.1.
. remove python2.6 test support

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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.
. version jumped because it will be easy to see pyexcel-htmlr depends on
pyexcel-io v0.5.0

**Relocated**

. type detection code is being relocated into pyexcel-io