Various dev bundle upgrades

* http-proxy: 1.0.1 (from a pre-release fork of 1.0)
* Node: 0.10.24 (from 0.10.22)
* semver: 2.2.1 (from 2.1.0)
* request: 2.33.0 (from 2.27.0)
* fstream: 0.1.25 (from 0.1.24)
* tar: 0.1.19 (from 0.1.18)
* eachline: 2.4.0 (from 2.3.3)
* source-map: 0.1.31 (from 0.1.30)
* source-map-support: 0.2.5 (from 0.2.3)
* mongo: 2.4.9 (from 2.4.8)
* openssl in mongo: 1.0.1f (from 1.0.1e)

Have not yet updated the various minimum Node version requirements.
Bump dev bundle version.
Update Node to 0.10.25. Remove bug workaround.
Use a fork of http-proxy with two PRs
Add $USE_TEST_DEV_BUNDLE_SERVER
Update to newer http-proxy API

Take out workaround that's been incorporated into the branch we're using
Merge branch 'dev-bundle-http-proxy-1' into devel
Minor optimizations to new _IdMaps
Don't yield in oplog entry handler
Simplify crossbar by making it synchronous

All existing listener callbacks were already calling complete()
synchronously, so this should not be a functional change.

This allows us to also eliminate the callback from crossbar.fire().

This in turn allows us to eliminate the `proxy_write` in
Meteor.refresh. The only purpose of that write was to keep the current
write fence open until fire's async callback got called; now that fire
works synchronously, it's not necessary!  (This relies on the fact that
write fences never get armed while they are the current write fence,
which now has an assertion.)
Ensure crossbar callbacks not called after stop

Hopefully fixes #1767.
Upgrade kexec, drop shell-quote

We only used shell-quote to workaround kexec's lack of a feature added
in this version.
Use new exec
Merge branch 'new-kexec' into devel
add missing semicolon

just happened to notice it
jquery -> v1.10.2
History update for jQuery backported from shark
Try to fix inconsistent release manifest generation

Apparently on some platforms "a5" < "a-" and on others
"a-" < "a5"
Try to fix inconsistent release manifest generation; Take 2
Style change to skel to match shark.