initial markdown of mobile mapping category
remove non essential files
remove duplicates files
added gpsessentials images and modified image links
rename image descritptions
resized mobile mapping screenshots
spellchecks and improving figure description to images in beginners and editing category
styling improvements in the mobile-mapping category
image resize and other minor styling edits
fieldpapers figure/images text improvementsa
Merge branch 'phsprint_mobilemapping' of https://github.com/maning/learnosm into maning-phsprint_mobilemapping
some spelling and grammar edits
Merge branch 'maning-phsprint_mobilemapping' into gh-pages