Rename pxe_template_dir setting to boot_loader_conf_template_dir

PXE refers to DHCP+TFTP. This template directory only contains
boot loader configuration templates, so setting name should reflect
that more clearly.
Rename source/dest boot loader configuration templates directories

PXE refers to DHCP+TFTP. This template directory only contains
boot loader configuration templates, so directory name should
reflect that more clearly.
Rename file serializer/deserializer name

Old name was serializer_catalog.py. Catalog is not an intuitive name,
serializer_file.py is more intuitive.
bin/cobbler reference to BootAPI changed to CobblerAPI.

Now cobblerd does start again, this fixes #1220.
Merge pull request #1221 from jmaas/master

bin/cobbler reference to BootAPI changed to CobblerAPI.
Module manage_in_tftpd.py now returns 'in_tftpd'  from what().

Besides this being a bit more consistent this also fixes some
warnings in 'cobbler check'.
Merge pull request #1225 from jmaas/master

Module manage_in_tftpd.py now returns 'in_tftpd'  from what().
Rename VALIDA_REPO_BREEDS to REPO_BREEDS.
Move virt types list into validate.py.
Remove Monit support from Cobbler core.

Managing services and their configuration should really be
done by a configuration management system (eg. Puppet).
Docs: document the Monit removal in the release-notes.
Merge pull request #1226 from jmaas/master

Remove monit support and minor repo_breeds refactoring
Move redhat-management (spacewalk/satelite) support from core to contrib.

These vendor specific bits don't any longer belong in the core of Cobbler.
Moving stuff like this in modules/contrib/packages improves maintainability
of Cobbler, also we don't want to be biased towards any Linux vendor.
Merge pull request #1227 from jmaas/master

Move redhat-mgt (spacewalk/satelite) support from core to contrib.
Update documentation to reflect the removal of redhat_management.
Merge pull request #1228 from jmaas/master

Update documentation to reflect the removal of redhat_management.
Minor release-notes updates.
Merge pull request #1229 from jmaas/master

Minor release-notes updates.
Minor release-notes updates.
Merge pull request #1230 from jmaas/master

Minor release-notes updates.