CRAN release v0.11.0

git2r 0.11.0

NEW FEATURES

• Add punch card plot.
• Add branch argument to clone with name of the branch to checkout.
• Add 'force' argument to 'add' method to add ignored files.
• The following methods can now be called without the repository
  argument: 'branches', 'references', 'remotes', 'tags' and 'workdir'.
  When these methods are called without the repository argument, the
  repository is searched for with 'discover_repository' in the current
  working directory.
• Add name of branch to each item in branch_list.
• Add name of tag to each item in tags list.
• Add S4 class 'cred_env' to pass credentials in environment
  variables.
• SSH transport on Windows. This requires 'LibSSH2' and
  'OpenSSL'. These two libraries are downloaded from
  'https://github.com/rwinlib' during configuration of the package.
• Static linking of LibSSH2 on OSX to support redistributable binary
  package with SSH transport enabled. Version 1.6.0 of LibSSH2 is
  downloaded and built from 'https://github.com/libssh2/libssh2'.

IMPROVEMENTS

• Better summary output from S4 classes 'git_commit' and
  'git_repository'.
• Updated libgit2 source code to commit (98f7bd2) from 2015-08-05.

BUG FIXES

• Add imports to DESCRIPTION to fix CRAN notes.
• Fix plot function to use the repository argument 'x'
• Update configuration to build on OpenBSD.
• Fix checkout branch in empty repository.
• Fix path argument in rm_file.
• Internal refactoring of C code that raise error to prevent segfault.