Merge pull request #88 from mbocek/master

Login via google service
maven profiles redefinition
added placeholder for callback url
added log information
fixed foreign key
Added logo for mobile applications.
Mobile logo colors fix
Registration page fix
Minor UI fixes.
Index page improvements.
constraint creation order
constraint creation order changed
Merge branch 'master' of github.com:sharetask/sharetask
fixed table name in migration script
fixed foreign key name in drop
Fixes #90.
Fixes #91.
enrich logging
log system reconfiguration
added tracing method parameters