* feat(install, svn): remove svn
Remove everything related to svn.
Rename uoj-svn-lib to uoj-data-lib.
Save preparing problem data to /var/uoj_data/prepare/problem_id.
* Typo: uoj_date -> uoj_data
* add: backward compatibility
BREAKING CHANGE: Preparing problem data location is changed
You need to move files from /var/svn/problem/{id}/cur/{id}/1 to
/var/uoj_data/upload/{id}
Okay, in truth it is not really a bug.
We just change its name in php because function lacks.
For judger it will work correctly and will not crash during running the program.
But, to avoid inconsistence we use "Judgement" for all purpose.
"Judgment" or "Judgement"? They are both right.
You ask me which is better? I don't know.
I make the choice only because the word with more "e" is used almost everywhere.
Used more frequently and I don't want to edit a lot of files.
The compilers are all updated in Ubuntu 18.04 basesystem.
Add some defines for judger on compiling and replace web's display version to the real version.
To support new compilers we must modify the syscall list to let them run properly, otherwise they will error with "Dangerous Syscalls".
The Oracle JDK8 will read usagetracker profiles and record usage infomation, so disable it in order to not making junk files which may cause DGS.
Due to historic reasons, the version and path of compilers are specified.
This will remove these specifications to make judger more adaptable.
Also provide defines to specify new version and keep for default.
