Added tag 3.2.0 for changeset ffa86ffb5570

--HG--
branch : 3.2
reduce cancellation probablity
(transplanted from 9de6bcf8bd6673a847fcf9321ce40b4884e2781d)

--HG--
branch : 3.2
extra : transplant_source : %9D%E6%BC%F8%BDfs%A8G%FC%F92%1C%E4%0BH%84%E2x%1D
Fix bug 635: add isCompressed to MappedSparseMatrix for compatibility
(transplanted from 773a8bf23df6a7ca7dd0b17e3bb90446c683d7e9)

--HG--
branch : 3.2
extra : transplant_source : w%3A%8B%F2%3D%F6%A7%CA%7D%D0%B1%7E%3B%B9%04F%C6%83%D7%E9
Remove LinearLeastSquares.dox , which should not have been added.
Accidentally included in changeset e1dfda41aec9 .
(transplanted from d5a69e6c9b8e01f9da861105165f14d489d8c71f)

--HG--
branch : 3.2
extra : transplant_source : %D5%A6%9El%9B%8E%01%F9%DA%86%11%05%16_%14%D4%89%D8%C7%1F
QuickReference.dox: std::tan(array) --> tan(array), same for other functions.
(transplanted from bfde4817e5a0c4d13f5742fd9eab3b4d2da1731e)

--HG--
branch : 3.2
extra : transplant_source : %BF%DEH%17%E5%A0%C4%D1%3FWB%FD%9E%AB%3BM-%A1s%1E
Ref<> objects must be nested by reference because they potentially store a temporary object
(transplanted from 2d62a0ee5095587b74f01e19bb3845c2e89edb9f)

--HG--
branch : 3.2
extra : transplant_source : -b%A0%EEP%95X%7Bt%F0%1E%19%BB8E%C2%E8%9E%DB%9F
Fix cost evaluation of partial reduxions -> improve performance of vectorwise/replicate expressions involving partial reduxions
(transplanted from 88fd177ecfdd53620eb6d613e6e744d4a360333f)

--HG--
branch : 3.2
extra : transplant_source : %88%FD%17%7E%CF%DDSb%0E%B6%D6%13%E6%E7D%D4%A3%603%3F
Bug 638: fix typos in sparse tutorial
(transplanted from 10158ce79cbb8508fe1be8b68ba5a6d072c3bb17)

--HG--
branch : 3.2
extra : transplant_source : %10%15%8C%E7%9C%BB%85%08%FE%1B%E8%B6%8B%A5%A6%D0r%C3%BB%17
Fix broken link on transforming normals
(transplanted from f34a37d69e777a3eb3a52850a393fd309950e66e)

--HG--
branch : 3.2
extra : transplant_source : %F3J7%D6%9Ewz%3E%B3%A5%28P%A3%93%FD0%99P%E6n
Fix bug 642: add vectorization of sqrt for doubles, and make sqrt really safe if EIGEN_FAST_MATH is disabled
(grafted from 97d9a77721069028ca3bbe3c4d8978caeed940ac and 888c4f9a9c65918d8809e2ba51df88b7b26ecd77)

--HG--
branch : 3.2
Make FullPivHouseholderQR::solve returns the least-square solution instead of aborting if no exact solution exist
(grafted from 6814a13155ec120700c5b2b5d7e262f52323a43d)

--HG--
branch : 3.2
extra : source : 6814a13155ec120700c5b2b5d7e262f52323a43d
Fix compilation with ICC/MSVC combo
(grafted from 09c5bd1da9abd9fa3584dca0fe82a7a4cc67f395)

--HG--
branch : 3.2
extra : source : 09c5bd1da9abd9fa3584dca0fe82a7a4cc67f395
Another compilation fix with ICC/MSVC combo
(grafted from b144204d15d7c259ddcd4dab0f7724d3a8f7e262)

--HG--
branch : 3.2
extra : source : b144204d15d7c259ddcd4dab0f7724d3a8f7e262
Fix bug 654: allow implicit transposition in Array to Matrix and Matrix to Array constructors
(grafted from 918ef70eaf498215d471597c04c33b4c5939991b)

--HG--
branch : 3.2
extra : source : 918ef70eaf498215d471597c04c33b4c5939991b
Fix elimination tree and SparseQR with rows<cols
(grafted from 91fa81c4f59f1dada897c32ff16c64cb6b52f4c0)

--HG--
branch : 3.2
extra : source : 91fa81c4f59f1dada897c32ff16c64cb6b52f4c0
Removed non-standard conforming (17.4.3.1.2/1) leading underscore.
(grafted from 70084590d0c868d16948fb70518195f196d595d0)

--HG--
branch : 3.2
extra : source : 70084590d0c868d16948fb70518195f196d595d0
Fix assert bug in sparseQR
(grafted from bd3786d250645508611c2605c1733eb29158053c)

--HG--
branch : 3.2
extra : source : bd3786d250645508611c2605c1733eb29158053c
Reduce explicit zeros when applying SparseQR's matrix Q
(grafted from 744b1d67f0d11e288614e9db56147e666a5eb5aa)

--HG--
branch : 3.2
extra : source : 744b1d67f0d11e288614e9db56147e666a5eb5aa
Fix leaked memory for successive calls to SPQR
(grafted from 01def857d4f20ab36f60a4eaabc35d041add3750)

--HG--
branch : 3.2
extra : source : 01def857d4f20ab36f60a4eaabc35d041add3750
Fix SPQR Solve() when assigning to a Map object
(grafted from 705214450889f8c322e5536a3fb541e515b6cf58)

--HG--
branch : 3.2
extra : source : 705214450889f8c322e5536a3fb541e515b6cf58