Travis and Jenkins

fix build on FreeBSD

Create WIX files for building Windows Installer

Installs binaries and dependencies
Displays license agreement
English x64 only
Installs service
Service does not start currently when installed

Note: RTF version of license agreement is necessary for Windows Installer

Tested:
all the actions in various install states, but not with actual GCP
binaries

This fixes build errors when building on non-Windows with
go get github.com/google/cups-connector/...

Read/write sparse config files.

Replaced utility update-config-file with backfill-config-file and
sparse-config-file. Utility init now creates a config file that is
sparse, except for user-specified values that are != default values.

Fixes #125

Remove SNMP support.

Fixes #70, helps #186

Report config filename to log on start.

Remove raw printer filter from printer manager.

windows: Log to event log, add Windows Service interface

update-gcp-printer command to set daily user quota

Fixes #163

Fixes #174

windows: Fix incorrect job ABORTED state.

Fixes #157

Add --public option to share/unshare.

windows: Remove XDG dependency.

Windows doesn't benefit from XDG, and it doesn't install nicely like git dependencies.

Enables go get github.com/google/cups-connector/... on Windows.

Fix init bug.

When --gcp-user-refresh-token and --share-scope are specified, the user
refresh token wasn't set in the resulting config file.

Port to Windows

Remove dead code from XMPP.