Make hard tabs align to columns.
Make sure the overlayer class is only used once.

Using it twice causes context menus with the .overlay selector to
appear twice.
Closes #2601
Upgrade to apm 0.69
Upgrade to archive-view@0.33
Upgrade to git-diff@0.33
Upgrade to go-to-line@0.23
Merge pull request #2661 from atom/bo-fold-markers

Add fold markers to folded lines
Upgrade to settings-view@0.128
Merge branch 'master' of https://github.com/a-m-s/atom into ks-align-hard-tabs

Conflicts:
	src/tokenized-line.coffee
Add initial spec of hard tabs aligning
Test multiple tab lengths
Test multiple tab stops per line
Add token value directly to column
:lipstick: Use trailing for loop
Update specs where tab is now only 1 space
Update more expected tab lengths
Test odd-numbered tab length alignment
Default column to 0
Add parens for clarity
Verify token screen and buffer delta