Release 1.5.0

Release 1.4.0

Rework substitution maps to allow reusing them across compiles.

I need to be able to compile multiple CSS bundles using a rename map,
then recompile just a few based on hash checking.

There are two problems with using CssCompiler.execute(renameFile, ...).
1. CssCompiler writes out the rename map using only the entries actually
   encountered by keeping a side table of mappings, not getting the
   entire mapping from the SubstitutionMap.
2. MinimalSubstitutionMap and others have no standard way to reconstitute
   a substitution map from a string->string relation.

This addresses both problems.

I added read() methods to OutputRenamingMapFormat.

I added an Initializable interface to SubstitutionMap that allows
reconstituting a renamer from a rename map, and reworked
RecordingSubstitutionMap and friends to implement Initializable.

Along the way, I cleared up an ambiguity in how SplittingSubstitutionMap
& RecodingSubstitutionMap interpreted renamings that caused problems
when a prefixing substitution map effectively prefixed only the first
renaming in a chain.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=131714015

Release 1.3.0

Adding "vector-effect" as recognized property.

W3 Spec: https://www.w3.org/TR/SVGTiny12/painting.html#NonScalingStroke
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=116700921

Closure Stylesheets release 1.1.0

Improvements since 1.0:
*   270e6f4
    Preserve comments with `@license` or `@preserve` in
    `TemplatesCompactPrinter`.
*   5e681fe
    Add extra color methods:
    *    `saturateColor(color, amount)`
    *    `desaturateColor(color, amount)`
    *    `greyscale(color)`
    *    `lighten(color, amount)`
    *    `darken(color, amount)`
    *    `spin(color, hue_angle)`

Bugs fixed:
*   f2d1877
    #70 Defining and calling mixins from separate files causes "Compiler
    internal error"

Special thanks to Yves Brissaud (@eunomie) for the new color methods and
@hochhaus for reporting bug #70.

Implement a string concatenation gss function: concat(...)

This allows to dynamically construct urls, e.g.

@def HOST static.example.com
.img {
  background-image: url(concat('//', HOST, '/image.png');
}
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=105082418