DOC: make compatible with numpy v1.6.1

all does not work so use array_equal

DOC: make compatible with numpy v1.6.1, all does not work so use array_equal
Merge pull request #3786 from cpcloud/read-html-lxml-failed-parse

DOC: make compatible with numpy v1.6.1
Added examples to CSV section in cookbook
link to a numerical integration recipe
Merge pull request #3790 from kermit666/patch-1

link to a numerical integration recipe (Issue #3759)
Merge pull request #3789 from nipunreddevil/cookbook-csv

Added examples to CSV section in cookbook
BUG: (GH3795) better error messages for invalid dtype specifications in read_csv

     accept 'str' as a dtype in read_csv to provide correct parsing

BUG: py3k support for str dtype (which is actually unicode)
Merge pull request #3797 from jreback/GH3795

BUG: (GH3795) better error messages for invalid dtype specifications in read_csv
DOC: fix groupby.rst building
DOC: coookbook.rst
CLN: refactored url accessing and filepath conversion from urls to io.common
Merge pull request #3808 from jreback/iocom

CLN: refactored url accessing and filepath conversion from urls to io.common
DOC: turn off the ipython cache

Also clean up some unused import there

DOC: disable ipython cache
DOC: add link to tips data set in rplot docs
DOC: replace totbill with total_bill

CLN: whoops wrong filename
DOC: make tips.csv consistent
Merge pull request #3809 from cpcloud/ipython-cache-fix

DOC: turn off the ipython cache
Merge pull request #3802 from cpcloud/tips-dataset-link

DOC: add link to tips data set in rplot docs
correct FRED test (GDP changed ...)
remove unused import in test_yahoo