Added cyclotomic field.
Bugfixes.
Merge pull request #3 from sebasguts/master

Cyclotomic fields
SetName for cyclotomic fields Q(zeta_n) -> Q[zeta_n]
fixed HomalgCyclotomicFieldInMAGMA
HomalgCyclotomicFieldInMAGMA now passes the root name correctly to MAGMA
comments
installed CreateHomalgTable for IsHomalgExternalRingObjectInGAPRep
added comment to init_string entry in HOMALG_IO_GAP
declared and installed GAPHomalgMacros and InitializeGAPHomalgMacros
added comment
used EvalString @ homalgSendBlocking @ String for external GAP elements

+ installed homalgSetName for external GAP elements
added attrib(B,\"isSB\",1); to DecideZeroRows and DecideZeroRowsEffectively

+ second argument of DecideZeroRows and DecideZeroRowsEffectively is (casted to) a module
+ DecideZeroColumns now used DecideZeroRows

this avoids Singular's warning (stdout): // ** _ is no standard basis
removed obsolete spaces
fix docu for Singular macros
standard banner
support passing the external ring object and ring types to RingForHomalgInExternalGAP

This is a temporary implementation to support SingularForHomalg.
It should be replaced by a better implementation for all RingForHomalgIn*
using an option record.
added PartiallyReducedBasisOfRowModule/ColumnModule to SingularMacros and MAGMAMacros

and added corresponding inactivated (i.e., X_'ed) entries to
CommonHomalgTableForSingularBasic and CommonHomalgTableForMAGMABasic