link thumbnail alt and title attribut

and show default icon if thumb is very small
category parent added to web service
portfolio files can be opened via web service token
add description field in 1st and 2nd level category
web service update
strip html tags
catch file related errors
new field parentid, show only items with solved parents

wih solved parents
epop bug images get always smaller on update
allow sharing with users not in course: add a search
xsd file for import
corrected error in view sharing
ws update
Merge branch 'experimental' of https://github.com/gtn/exaport into experimental
user sharing search form update
pgsql error
exaport <> exacomp badges interaction
Merge branch 'origin/experimental'
add button if categories in lang file
additional lang file for adding std. categories