Julia v0.7 compatibility - lastindex/range

[pjabardo]

The function endof is now lastindex and linspace was substituted by
range using keyword arguments. Another change is from reprmime to repr.

In some cases simply using Compat was enough. In some of the tests,
the version number was explicitly called: I Compat wasn't enough.

There are still a few warnings when testing in v 0.7 in the tests that I can not figure out where they come from such as:

┌ Warning: `x ^ p::Integer` is deprecated, use `Base.power_by_squaring(x, p)` instead.
│   caller = @generated body at none:0 [inlined]
└ @ Core none:0

or

┌ Warning: `conj(x)` is deprecated, use `x` instead.
│   caller = top-level scope
└ @ Core :0

Other than that the tests pass for version 0.6.2 and 0.7

[martinholters]

Bump. Would be nice to get lastindex(::Poly). E.g. DSP.jl needs it.

[martinholters]

Bumpity.

[ararslan]

Thanks, and sorry for the delay!