Minor format changes
Standardize some spelling. Add remark about not supported gmap format.
update more broken links, remove some TOC and image inconsistencies
Set the language marker correctly
TOC handling: add missing handling of code blocks in AddTOC.py, update TOC's inWiki pages
update DEM data set properties - add 'elevation limit'
add page BuildOSX with link to OSX compilation info
add TOC to almost all Wiki pages
remove [TOC} macro from Wiki pages
Initial commit to port the wiki from Bitbucket into GitHub