Minor edits. Added docstrings.

Some minor changes. Added docstrings.

v1.0.0

v1.0.0 (2019-05-24)

Diff since v0.1.0

Closed issues:

• Switch to DoubleFloats.jl (#10)
• norm(matrix) -> opnorm(matrix) in Julia 0.7 (#9)
• Tests don't pass on v0.5 (#7)

Merged pull requests:

• Julia v1.1 (#11) (ivanslapnicar)
• use version number instead of release in .travis.yml (#8) (tkelman)

Arrowhead and DPR1

Added tridiagonal divide and conquer and polynomial rootfinder.
Changed names of routines to use multiple dispatch.

Arrowhead and DPR1

Corrected bug in dpr1eigall deflation.