Fix: autoconf variable double defined
Ensuring python2; trying python2 (before python)
Merge pull request #253 from mmklee/sw_fix

Sw fix
Merge pull request #252 from alexanderdreyer/spielwiese-pyobject

Ensuring ./configure picks python2
fix #383

leads to changes in
dmod.lib,finvar.lib,involut.lib,primdec.lib,sheafcoh.lib
still to be fixed: modstd.lib,primitiv.lib,hnoether.lib,zeroset.lib
fix: warning for option chnges does not work for libsingular

Conflicts:

	Singular/iplib.cc
add: names(int level) added

Conflicts:

	Singular/iparith.cc
	Singular/ipid.cc
	Singular/ipid.h
add: option(noredefine) also for export
port: solaris does not like local structs
fix: syzygies for qring with ring-coeffs, part1
fix: some simple bugs in comparison
fix: warning for option changes does not work for libsingular

(from master, currently unused as options are in libsingular, not main)
add: option(noredefine) also for export

(from master)
Merge branch 'spielwiese' into sw_fix

* spielwiese:
  fix: warning for option changes does not work for libsingular

Conflicts:
	Singular/iplib.cc
fix: porting singnal handling (win, etc.)

Conflicts:
	Singular/cntrlc.cc
chg: change omAlloc policy: OM_DEFAULT_PAGES_PER_REGION to 512 (2 MB)
add: names(int level) added

(from master)
Merge branch 'spielwiese' into sw_fix

* spielwiese:
  add: names(int level) added
  chg: change omAlloc policy: OM_DEFAULT_PAGES_PER_REGION to 512 (2 MB)
  fix: porting singnal handling (win, etc.)
  add: option(noredefine) also for export
fix: NULL deref in qideal test

NOTE: adaptation of 071e6adf671c14d7003accadcce5271a90cde970 to SW
fix: support very very long names in listvar

(from master)