BUG: fix sum over integer frames
TST: Make network tests run twice
ENH: Use case-insensitive checks for 'inf' in parser.

Instead of just 'inf' or '-inf', can test for 'Inf', '-Inf', 'INF', etc.
Uses strcasecmp under the hood.

(also, small fix to assert_almost_equal to make string comparisons
clearer)
Merge pull request #4220 from jtratner/expand-inf-comparisons

ENH: Treat 'Inf' as infinity in text parser
Merge pull request #4366 from cpcloud/frame-sum-int-perf-reg

BUG: fix sum over integer frames
DOC: revised code-blocks in remote_data.rst
Merge pull request #4369 from jtratner/make-network-tests-run-twice

TST: Make network tests run twice
TST/BUG: make sure read_html tests work on python 2.6
BUG: fix compilation with MSVC for strcasecmp
Merge pull request #4352 from cpcloud/html-testing-assertions-fix

TST/BUG: make sure read_html tests work on python 2.6