Merge branch 'develop' into t/19918/symbolics/subs_oo

* develop: (414 commits)
  Updated Sage version to 7.1.beta2
  implement expansion.is_exact() by using term.is_exact()
  remove INPUT in docstring
  replace isinstance(..., ExactTerm) with is_exact
  implement is_exact for terms
  Add an import-line to example.
  Removed table of types
  Trac #20000: remove redundant pair of parentheses
  Trac 19994: Arb: Euler's constant
  Rewrote some sentences and fixed typos
  Doctest corrections.
  No ö for string constants.
  Upgrade pari_jupyter to 1.1.0
  Double 'encoding' line removed.
  Another ...-continuation.
  improve performance of is_exact
  implement is_exact
  Trac #19510: constitent spacings
  Trac #19532: add relative tolerance to doctests introduced on this ticket
  Trac #19898: add relative tolerance to doctests introduced on this ticket
  ...

Author: rwst

VERSION.txt

@@ -1 +1 @@
-Sage version 7.1.beta0, released 2016-01-24
+Sage version 7.1.beta2, released 2016-02-04

build/pkgs/cliquer/SPKG.txt

@@ -16,7 +16,4 @@ http://users.tkk.fi/pat/cliquer.html
  * None
 
 == Patches ==
- * Makefile.patch: Patch the Makefile for Sage. Remove hardcoded
-   compiler and linker flags, allow flags to be set from spkg-install.
-   More importantly, we're building cliquer as a dynamic shared library,
-   instead of a stand-alone program.
+ * autotoolized - see https://github.com/dimpase/autocliquer