API changes and documentation update

1.6.0

doc updates for SeisInvExpt

register with METADATA

v1.5.1

added REQUIRE

more minor changes for Julia v1.0

added REQUIRE

v1.0 release

1.4.9

v1.0 fixes

Multi-component Inversion

use [:P, :Vz, :Vx] to record and invert multi-component data

finalized born mapping

• travis tests all FWI routines, including born mapping and its adjoint
• a few more v0.7 fixes

v0.7 release

• a few bug fixes, parallel implementation commented

new interpolation API, faster FWI

1.4.5

fixing tests

updated tests

1.4.4

mono-parameter now possible, updated tests

using ImageFiltering and PlotReceips

updated Plots --- removed dependency on PyPlot

using ImageFiltering for model smoothing