Merge branch 'master' of https://github.com/johanmattssonm/birdfont

Remove xml parser

Rename XML namespace

Use GObject system in XML parser

Always include posix.vapi

Speed optimizations in the XML parser
Uses a referens counted string class instead of copying the entire XML document.

Update grid when switching tab

Compile the Xml parser (libbirdxml) with posixvala

Libbirdxml documentation and examples

Use foreach iterator in libbirdxml