Fixed copyright years.

Implemented assignment of GFs (data only!)

Assignment is possible only if meshes match, and only copies the data.
Testing of assignment of GF-with-tail is added.
(Fixes issue#208).

Updated copiright notice for year 2016.

Eliminate a few more warnings in tests.

Mostly "unused variables".

Fix for whiny compilers.

Fix alps::params test compilation error for clang++.

There seems to be a bug in clang, see
https://llvm.org/bugs/show_bug.cgi?id=22247

A workaround is introduced.

Update comments in main.cpp of Ising simulation tutorial.

Very rough draft of "Installation and Use" doc is added.

(cf. issues ALPSCore#53, ALPSCore#54).

Make tutorials work again.

Partial testing of alps::params streaming.

Tests only scalars, string, and boolean.

TODO: Add vectors, uninitialized values, alps::params instance with several options defined.