Adding Markdown document types.
Building basic UI.
Inheriting MACOSX_DEPLOYMENT_TARGET for Demo from project.
Adding WebKit to Demo.
Implementing Demo document loading and saving.
Implementing support for default font.
Adding toolbar.
Adding tab view and improving toolbar.
Implementing tag tree.
Using “tgmath.h”.
Converting SimpleTree keys to constant strings to prevent typos.
Adding attributes to nodes only if they are available.
Displaying tag attributes in tooltip for now.
Merge pull request #2 from JanX2/jan/tgmath

Using “tgmath.h”.
moved marker prefix scanning into category
moved image scanning into scanner
builds, but in flight DTMarkdownParser:198
Adding HTML text view to UI.
Binding segmented control and tab index together via selectedPreviewTabIndex.
Implementing and connecting SimpleHTMLGenerator.