v2.7.0

• Show which git commands are run by default.
• tsrc init: fix order of operations - clone the local manifest before
  writing the workspace configuration. Fixes #344, where users could not run init a second
  time if the previous call failed. Bug report by @cgestes.
• tsrc init: do not assume the default branch of the manifest is master. Note that master is still hard-coded in a few places. See #347 for details.
• When using -j 1, do not sort repositories by lexical order of destination, but preserve
  the order in which they were specified in the manifest. Suggested by @raabf.