Some changes to updater
Merge branch 'dev-0.3' of https://github.com/popcorn-official/popcorn-app into dev-0.3
Link change log button to blog
Update CHANGELOG.md
Merge branch 'dev-0.3' of https://github.com/popcorn-official/popcorn-app into dev-0.3
Fix Windows updater exec
Merge branch 'dev-0.3' of https://github.com/popcorn-official/popcorn-app into dev-0.3
change close button css on help modal
Merge branch 'dev-0.3' of https://github.com/popcorn-official/popcorn-app into dev-0.3
Update help.styl
Merge branch 'dev-0.3' of https://github.com/popcorn-official/popcorn-app into dev-0.3