Refactoring, small improvements, and cleaning notation of IsotonicRegression
DOC more complete coverage of API linking in examples

Previously ignored non-plot files.

Avoids some link over/undergeneration
TST add test for name identification in RST generation
TST avoid nose running setup() in gen_rst.py
TST add sphinxext to testing
Changing docs from "vector" to "1d array"
TST remove dependencies for testing sphinxext
Branching 0.15.X to prepare the 0.15.0b1 release
Minor fixes in the docs
Fix some fun column span alignment errors.
Reverting array X to vector x rename
Docstring addition and x->X
removed unused variables and imports, add used imports where missing.
COSMIT TYPO
Stop using some deprecated interfaces.
Merge branch 'pr/3263': minor fixes from the 0.15.X branch
MAINT: restore -git version in the master branch after the last release merge
Incorporating @ogrisel's comments for simplification
More simplifications
Fixing simplification for clip