Add unsymlinked.git test repository
diff: refactor git_diff_tree_to_tree() tests
diff: Enhance tree-to-tree diff test coverage

These tests are related to issue libgit2/libgit2sharp#196
Improve MSVC compiler, linker flags
Change git2.rc to identify git.dll as VOS_NT_WINDOWS32
Merge pull request #1335 from phkelley/development

Improve MSVC compiler, linker flags
Fix a git_filebuf leak (fixes Win32 clone::can_cancel)
Fix a leak when canceling a network operation
push: improve docs on success / failure of git_push_finish
Merge pull request #1340 from schu/push-docs

push: improve docs on success / failure of git_push_finish
Merge pull request #1318 from nulltoken/topic/diff-tree-coverage

Topic/diff tree coverage