SERVER-12532 prevent negations from using special indices such as geo or text
SERVER-7757 added test cases for "a.b" $all + $elemMatch where a is document/array
SERVER-12380 Port update optimizations to batch write commands.

Doing this requires that the write commands set last error themselves, rather
than depending on the assert-time setting used previously, as well as minor
restructuring of the multiUpdate() function.
SERVER-9123 Include snmp files in enterprise packages
rename snmp.md to README-snmp.txt and copy MONGO-MIB.txt alongside docs instead of into snmpd directory
rm mongoadmin
version bump for enterprise packages version 2.5.5
use nightly binaries for tarball download, redhat only
use ubuntu nightly, build ubuntu only
add branch and repo_os_version, use new repo directory layout
simplify tarball logic, add non-free to directory layout and build both distros
fix redhat repo directory layout with arch directory
add repo name (mongodb-enterprise) to redhat repo directories
directory restructuring
version bump 2.5.4
don't use '.', and use any Release file found
Don't print empty Release line, include version, move Release file back to branch directory, and build rpm in build_os specific directory
version bump 2.5.5
Remove version from Release, include repo name in code name
Create repo symlinks for branches and redhat release vers