fix pip install issues

This is minor release addresses issues including

• setup.py did not find libHYPRE.so in lib64
• pip install did not place libmfem.so in a proper place when prefix is not given

4.2.0.1

Minor fix to 4.2.0.0

• Baseclass of Bilininteg is set to NonlinInteg.
• Added deprecated message. The warning turns on when -Wd option is used (python3 -Wd ....)

4.2.0rc1

Merge pull request #39 from mfem/4_2_0_rc1

4 2 0 rc1 (passed current test. )

4.1.1

Update README

4.0.2: Merge pull request #26 from sshiraiwa/pumi_cast_fix

• Improved Vector/Matrix coefficient constructor argument processing
• minor fix for pumi integration

4.0.1

Merge pull request #24 from sshiraiwa/master

Adding import_array init block 
Test with examples and Petra-M

4.0.0: Merge pull request #21 from mfem/MFEM4_dev

works with MFEM4
Python3 (>= 3.6) supports

release 3.4.3

This version is the last version for MFEM3.4.
We move on MFEM 4.0 (being developed under mfem4_dev

3.4-rc1

wrapper code generated from mfem release 3.4

minor fix/optimization to ex18p, ex7

ToDo list (for 3.4 release)
** ex19, ex19p translation
** wrap newly added classes such as ComplexOperator, BlockNonlinearForm

Wishlist
** support direct solver (Strumpack)
** any other?

v3.3.2

PyMFEM 3.3.2

• wrapper code are generated using mfem-3.3.2
• INSTALL guide is renewed. It describes how to install mfem as shared library and how to link PyMFEM to it
• ex18 and ex18p
• Other small changes