remark: CopyD on list elements
format
Fixes for SINGULAR_4_1
add: access to fetch internals
format
chg: FETCH_M: tests etc.
Singular 4.0.1p2
fixed lusolve (track issue 358)
fix: prepareQuotientring
fix: redef, quotring
Merge pull request #681 from surface-smoothers/spielwiese.fix.lusolve

bugfix for  lusolve (track issue 358)