Merge branch 'release/0.6.4' into develop
libdns is now required for source builds
Remove mod_enum support

1. We’re not using it.
2. The build seems to be broken (complains about a missing libldns-dev package, even when installed)
Additional dev packages needed for source builds
Use new FreeSWITCH source control URL
Fix git url in readme
Merge pull request #18 from Nasga/develop

Fix git url in readme
Changelog entries
Bump to 0.7.0
Merge branch 'release/0.7.0'