linking to submission task
add facebook acc
optimize linking to submission
published achievement task
Revert "optimize linking to submission"

This reverts commit 3d3ddba1ed29cbd9086b10523cd8534e7ee14589.
Revert "Revert "optimize linking to submission""

This reverts commit 8fff62a17c086d870f03909b589af8b53c71757f.
Revert "published achievement task"

This reverts commit 676fc0b6b1f681e5b9b010e8f75b5ef8303cbdd1.
Merge pull request #51 from hiepluonghlv/hiepluong_dev

Hiepluong dev