Merge pull request #122 from aycanirican/master

DOM set/get Attribute
haste-lib is now installable under native GHC.
Fix native compilation of Haste.DOM.
Add basic WebSockets library in Haste.WebSockets.
Add Int64 support. Word64 still missing.
Add Word64 support.
Remove "no 64 bit math" from README.
Implement popCnt# primop.
Remove deprecated Word64 stuff from rts.js.
Add popCnt8/16/32# primops.
Fix exceptions; they broke on 64bit with proper Word64 support.
Bump version to 0.2.10.
Update README with better Haddock instructions.
Add --trace-primops flag to haste-boot which adds tracing to all primop calls.
Strip out comments from lib/Int64.js.
Remove some unused methods from Int64.js.
Make haste-boot work without --trace-primops again.
--opt-all now implies --opt-whole-program
Make haste-inst and haste-pkg exit with an error on failure.
Break out Control.Shell into its own library.