[WikDict importer] fix changelog creation

The changelog logs changes. The one generated by this script overwrote the
previous changelog, instead of adding a new entry to the front.

[ding2tei] Place @xml:lang (more) correctly

Now:
 - at top-level text element: source language
 - at each cit@type="trans": target language

Previously:
 - at the top-level text element: target language
 - at each quote element: the respective language

Update README and COPYING

Update readme

tei2c5.xsl: Report progress

* in hope to avoid Debian buildd error "E: Build killed with signal TERM after 150 minutes of inactivity"

mk/dicts.mk: pass path to dictionary directory to XSL processor

Previously, copying files to build/tei broke xincludes, DTD retrieveal,
etc. Passing `--path` to the dictionary source directory fixes this.

correct slightly wrong espeak language detection logic

correct slightly wrong espeak language detection logic

Update Copying with author information