DOCS-1512 fix eval params/fields

Signed-off-by: Sam Kleinman <samk@10gen.com>
build: helper function for merging patches
Alters iostat

"iostat -xmt 1" should be used as this allows:

t -  timestamp
1 - per second resolution

And is more inline with the output for Mongostat

Signed-off-by: Sam Kleinman <samk@10gen.com>
tools: setting default signoff for fab git script.
build: refactoring intersphinx downloading
build: adding cherrypicking helper to git helper
2.6 (2.5.x Dev series) release notes

Signed-off-by: Sam Kleinman <samk@10gen.com>
build: fixes to rst generator
DOCS-1508: adding note about authenticating to the local database in 2.4