[thread.threads] Add lock tags to index of library names.

Reported by Geoffrey Romer.

Fixes #76
Merge pull request #88 from jwakely/issue76

[thread.threads] Add lock tags to index of library names.
[array.swap] Use code font for array::swap.
[associative.reqmts] Capitalize start of sentence.

Reported by Stephan T. Lavavej.

Fixes #89
Add ctags files to gitignore
[ptr.align] Add missing exitnote command.

Reported by Stephan T. Lavavej

See #94
[util.smartptr.ownerless] Add missing exitnote command.

Reported by Stephan T. Lavavej

See #94
[locale.time.get.members] Add missing exitnote command.

Reported by Stephan T. Lavavej

Fixes #94