DOC: io.rst top-level can now click on read/write methods to acess the appropriate sections

DOC: cleaned v0.13.txt
Merge pull request #5750 from mortada/series_apply

DOC: added missing argument in Series.apply
ENH: set display.max_seq_items default != None
BUG: construction of DataFrame from empty Series regression (GH5756)
BUG: Row-wise concat of differeing dtypes failing in certain cases (GH5754)
Merge pull request #5757 from jreback/fixes

BUG: empty Series construction (GH5756), concat issues (GH5754)
API: Series.ravel compat with ndarray
Merge pull request #5759 from jreback/ravel

API: Series.ravel compat with ndarray
Merge pull request #5753 from y-p/PR_max_seq_items

ENH: set display.max_seq_items default != None
DOC: remove travis mentions in CONTRIBUTING.md. It just works now.
DOC: more CONTRIBUTING.md guidance
Added plyr and reshape comparisons
fixed indentation and import
TST: corner_case for read_csv with usecols GH5766
BUG: regression in read_csv parser handling of usecols GH5766

GH4406 fixed one bug and introduced (exposed?) this corner case
where the loop over columns continues even after all usecols
have been fulfilled, causing an out-of-bound lookup in names.
Merge pull request #5770 from y-p/GH5766

BUG: regression in read_csv parser handling of usecols GH5766
BUG: setitem for iloc/loc with a slice on a Series (GH5771)
Merge pull request #5772 from jreback/series_loc

BUG: setitem for iloc/loc with a slice on a Series (GH5771)
DOC: Mention rpy2 breakage in release notes
TST: closes (GH5778), failing tests on non-little endian for stata (sparc)