Merge pull request #4403 from juliantaylor/release-notes-1.8.1

Release notes 1.8.1
BUG: Fix histogramdd treatment of events at rightmost binedge

Closes gh-4266
TST: fail on declaration-after-statement in travis test

required for windows compilers
MAINT: add python3.4 to paver file
BUG: enable windows large file support for mingw

The (non-lfs) posix api mingw otherwise uses does not seem to work on win32.
The windows lseek prototypes are available in the ancient mingw32 version
we use for our windows binaries but not the fseek/ftell, so they are
defined manually.
DOC: add histogram fix to release notes