Trim leading colon from ssh repository path
Test for repo before removing leading colon
Merge pull request #1839 from isaac/ssh-repository-invalid

SSH: Clone fails with errors: ERROR: Repository invalid & Early EOF
clar: Fix clar__assert_equal error message formating
clar: Move cl_assert_equal_sz() definition to clar.h
Merge pull request #1848 from libgit2/ntk/fix/cl_assert_equal_sz

Fix cl_assert_equal_sz error message formating
Prevent git_tree_walk 'skip entry' callback return code from leaking through as the return value of git_tree_walk
Fix memory leak in git_tree_walk on error or when stopping the walk from the supplied callback
Merge pull request #1849 from whavinga/treewalker

Treewalker
Add tests for git_tree_walk

This tests the fixes for issues from #1849
git_clone supports optional init_options
Merge pull request #1850 from linquize/git-clone-init-options

git_clone supports init_options