There were 2 namespaces with the prefix "css". Merge them.
Delete property typeform-indication

Its functionality will be covered by the more generic "text-transform".
Support 'url(...)' as first argument of target-(text|counter|string)
Add property 'hyphens' (braille-css.xsl)
All transformers/translators inherit from a single Java interface

- Every type of `Transform' has its own input/output contract.
- Transformers can be queried (with a CSS query), filtered (by type or
  other properties) and selected through Providers. Doing all this in
  Java (and not e.g. in XSLT or XProc) allows for more
  advanced/intelligent selection and delegation of transformers.
- Provider can now provide more than one object (`get' returns
  Iterable<X> instead of X), objects are sorted according to best match
- XProc-based transformers implement the interface XProcTransform
- Translator is renamed to TextTransform and can now translate a
  sequence of text nodes instead of only a single string.
- LiblouisTranslator is now a `CSSStyledTextTransform' which means that
  it can translate text with inline-level formatting (represented by a
  CSS stylesheet). "hyphens:auto" makes the translator hyphenate the
  text. The properties font-style, text-decoration, etc. are interpreted
  into the liblouis typeform parameter. The XSLT function
  louis:get-typeform that used to be responsible for this is deleted.
- louis:translate now takes a sequence of text strings and a sequence of
  style strings and returns a sequence of translated strings.
Rename pf:translate to pf:text-transform
Add step `px:transform' for selecting and running an XProc transformer

uses cx:eval
Make louis:translate-mathml into an XProcTransform

so that selection of math code based on locale can be done in Java
Design changes in zedai-to-pef & dtbook-to-pef

- Drop `translator' port (which had to be a sequence of XSLT/XProc
  documents) and replace with the new `transform' option (a CSS query) -
- Make translators in xml-to-pef XProcTransform instances
- Make formatter configurable (louis:format vs. dotify:format)
- Delete px:xml-to-pef.convert, use high-level steps css:inline,
  px:transform and pef:add-metata (now in pef-utils) directly in scripts
Allow empty string for CSS query
Merge pull request #1 from snaekobbi/transform

Various changes that help shifting the control flow towards Java