functions, then gitflow-specific functions and finally, assertions to use
in gitflow subcommands.

git specific and git-flow specific functions:

gitflow_current_branch             -> git_current_branch
gitflow_is_branch_merged_into      -> git_is_branch_merged_into
gitflow_local_branch_exists        -> git_local_branch_exists
gitflow_local_branches             -> git_local_branches
gitflow_remote_branches            -> git_remote_branches
gitflow_require_branch             -> require_branch
gitflow_require_branch_absent      -> require_branch_absent
gitflow_require_branches_equal     -> require_branches_equal
gitflow_require_clean_working_tree -> require_clean_working_tree
gitflow_require_git_repo           -> require_git_repo
gitflow_require_git_repo           -> require_git_repo
gitflow_require_initialized        -> require_gitflow_initialized
gitflow_require_initialized        -> require_gitflow_initialized
gitflow_require_local_branch       -> require_local_branch
gitflow_require_remote_branch      -> require_remote_branch
gitflow_require_tag_absent         -> require_tag_absent
gitflow_tag_exists                 -> git_tag_exists
gitflow_test_branches_equal        -> git_compare_branches
gitflow_test_clean_working_tree    -> git_is_clean_working_tree
resolve_nameprefix                 -> gitflow_resolve_nameprefix

GIT_EXEC_PATH overrideable via Makefile command arguments.

that case, don't check if the working tree is clean (this yields errors in
HEADless repos).

This fix enabled users to use "git init && git flow init", too.

variables are all set (they need to be set explicitly once).

fully initialized for use with gitflow.

Add a means of only asking for the missing gitflow definitions, not all.
(Of course, redefining all is always possible using the -f (--force) flag
of init.)

(dash), since the empty string '' means "take the default suggestion"
already. Only needed in rare cases.

conventions, too.

initialization and a more user-friendly (and more comprehensable) way of
asking the user which branches are the master/develop branch.

environment/branches.

Added test for existence of local branches.

-a" returns remote branches with a "remotes/" prefix. "git branch -r"
still returns branch names we are used to.

the variable is set explicitly by gitflow.

They are required. Their existence tells us that this repository is
gitflow-enabled.

Added some TODO notes to implement.

branches should be used for master and develop and then initializes the Git
repo itself and/or the git-flow branches for him or her.

git branch.

Added gitflow_branch_exists() function for testing existence.

Let gitflow_test_branches_equal() return with exit code 4 in case of the two
branches having no common ancestor.

existence of a valid git repo. Instead, functions gitflow_load_settings()
and gitflow_require_git_repo() have been added that can be called in each
submodule that requires such.

Specifically, git-flow init does NOT use this.

them live using git commands instead. This avoids git commands being
issued by subcommands that do not necessarily require an existing Git repo
to be initialized (i.e. git-flow init).

still exists one.

should come *after* the redirection of stdout to /dev/null. For an
explanation and a simple demonstration of the differences, see:

	http://is.gd/8srJR

    https://wiki.ubuntu.com/DashAsBinSh

Went back from making use of the specific Bourne shell construct 'typeset
-i' for easy integer calculations (typeset -i foo=123; foo=foo+456;) to a
more compatible way (local foo=123; foo=$((foo+456)); )

The 'typeset -f' call has been replaced by a call to 'type', effectively
not testing for existence of a declared *function*, but testing for
existence of a declared *something*. You have to sacrifice sometimes in
order to be more portable.

release/hotfix branch fails finishing, the user may just try so again.

Require branch and tag to be absent when start is run (for release/hotfix)

Require branch to exist when trying to finish (for release/hotfix)

Die the finish script when either the fetch, checkout or tagging fails.

- Move resolve_name_by_prefix() from git-flow-feature to gitflow-common
- Rename require_name() to require_name_arg()
- Refactor expanding of nameprefixes