Merge pull request #257 from vnitinv/master

to support VMX
fixes issue #256 - relating to using the "replace" marker
set default load action to replace.  add :merge: option to disengage replace
Merge remote-tracking branch 'juniper/master'
Merge pull request #259 from jeremyschulman/master

fix #256 - activate 'replace' option as default with config.load()
enhancements for fix#256
comment fixes
Merge pull request #261 from jeremyschulman/master

fix #260 - support ssh key files
add rescue config controls
Merge pull request #262 from jeremyschulman/master

add rescue config controls
addig sphinxdocs
updates for Sphinx docstrings
minor bug-fix on rollback id [0-49], was [0-50].
Merge pull request #264 from jeremyschulman/master

Sphinx docstrings for jnpr.junos.utils.config
sphinxdoc updates for SW utils
Merge pull request #265 from jeremyschulman/master

sphinxdoc updates for SW utils
sphinxdocs, more on SW
sphinxdoc updates, add to config file to show __init__
Merge pull request #266 from jeremyschulman/master

sphinxdocs, more on SW
Sphinx Theme
Merge pull request #267 from shermdog/master

Sphinx Theme