v0.15.0

Singular v0.15.0

Diff since v0.14.0

Closed issues:

• Inconsistent parameterisation of types (#33)
• Module types (#34)
• Bug in Singular.jl's std? (#239)
• bug in reduce (#416)
• iszero fails for certain rings (#557)
• Call to arnoldClassify fails (#585)
• Access to Singular interpreter variables from the kernel? (#595)
• Precompiling Singular fails due to libsingular_julia.so (#601)

Merged pull requests:

• Allow Vector{Symbol} in some ring constructors (#603) (@fingolfin)
• Avoid non-const globals (#604) (@fingolfin)
• immutable oopsie (#606) (@tthsqe12)
• test for std over Qt (#609) (@tthsqe12)
• DivBy(0,b) should check for zero divisor (#610) (@hannes14)
• add vdim for for smodule (#612) (@tthsqe12)
• Try zero divisors (#613) (@tthsqe12)