Updated CHANGES

Preparing 4.0 release

Preparing 3.0 release

Preparing for 2.0 release

bumping version to 2.0rc1

Moved the raw queries warning to caveats.rst

Prettier CHANGES (no ugly links)

adding 1.61 entry in CHANGES

preparing release 1.60, basically the same as 1.6 but makes pip/easy_…

…install work again (1.6<1.52, but 1.60>1.52)

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branch : 1.6.X

updating README

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branch : 1.6.X