use rubinius' heroku binaries
add checksum checking for rbx
Revert "special case JRuby 1.7.3 to older JDKs due to jffi bug"

This reverts commit 4ada7419e569fc968debbe1b418ec2e2297b27d5.

we rolled about OpenJDK versions
instrument the request_id
update changelog
v75
fix request_id instrumentation to follow Build & Packaging standard
update changelog
v76
nokogiri should compile with system libs

As of nokogiri 1.6.0, they default to using the vendored libxml2 libs.
This is problematic for two reasons. First, with the way the heroku
build environment works,
https://github.com/sparklemotion/nokogiri/issues/923. This means it
won't link nokogiri.so properly since it's dependent on hardcoded paths
that don't exist during runtime. Second, compiling libxml2 and friends
is unnecessary since we have them already setup. We should skip this to
speed up deploys.
Merge pull request #124 from heroku/nokogiri

nokogiri should compile with system libs
update changelog
v77
dont install plugins if plugins exist as gems
Warning when plugin gets installed

avoids the 'topic' output entirely if no plugins need to be installed
use if.any?
Merge pull request #11 from heroku/skip-plugins-if-gems

Skip plugins if gems
add intelligent messaging for the nokogiri fix
Merge tag 'v77'
[close #127] Fix LPXC Deadlock Error

LPXC can experience a deadlock error reported in #127 it was fixed in this commit:
https://github.com/ryandotsmith/lpxc/commit/1f0bd9c31324cac109a94f70589f62652b0146a3

We are vendoring those changes in in this commit