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July updates.

Added some useful functionality during June although some work still needs to be completed. The most annoying thing to be fixed was nagging issues over lineEnd and sentenceEnd, which was a simple logic matter. Of the most pleasing, reworking of dump. The aim being to provide the scripter with the ability to created serialized text files, Blog post to follow.

2021-06:

gnocl::text

o issues with lineEnd and sentenceEnd offset keywords now fixed. 

gnocl::labelEntry

o cget -value now works properly.

gnocl::tmpFile

o convenience command to create a temporary file name, with prefix.

gnocl::languages

o return information on languages supported and their naming conventions .

gnocl::text

o reworking dump command.

o new tag option -markup, assign pango markup equivalent (not validated).

o mark options -gravity and -visible can now be set on creation

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