[UPDATE] Auto convert number params in list
[UPDATE] Add fine uploader build directory
[UPDATE] Validate problem list before save it into database
[UPDATE] Add team register page
Merge pull request #73 from mzry1992/front-end-adjust

Front end adjust
clean up deprecated methods in picture service.
Merge pull request #75 from lyhypacm/persistence-cleanup

clean up deprecated methods in picture service.
delete maven configuration file and use gradle instead.
Merge pull request #77 from lyhypacm/persistence-cleanup

For #76 - delete maven configuration file and use gradle instead.
add java coverage plugin to help developers testing.
Merge pull request #79 from lyhypacm/testing-better

add java coverage plugin to help developers testing.
add idea plugin.
Merge pull request #80 from lyhypacm/testing-better

add idea plugin.