color theme added, pi formatting fix, scp font fix
added ref to 'Tomorrow Night' theme in docs
updated readme - plus new samples
added XQuery support

2 new XSLT files for highlighting XQuery:
1. xq-spectrum.xsl
2. xq-handler.xsl
xmlspectrum.xsl modfied to use XQuery doctype and import new XSLT
Update readme.md
Update readme.md
Update readme.md
removed diagnostics attributes from output
bugfix for issue with un-balanced xquery
GUI front-end for XSLT added
updated readme for xquery
further doc updates for xquery support
added new light color theme: 'github'

also slight tweaks to other themes
gui app now support github light color theme
updates for XQuery 3.0 candidate recommendation
for xquery updates
fix for toc and new xsl param for indent of mixed
update with new formatting options + deltaxml
improved syntax highlighting for xquery3.0 prolog
updates for xquery 3.0 samples