Fix warnings
Tabify indentations
commit: Trim message leading newlines

Fix libgit2/libgit2sharp#522
Merge pull request #1883 from libgit2/ntk/fix/empty_first_commit_line

Remove leading newlines from commit message
Merge pull request #1878 from libgit2/ntk/fix/warnings

Fix x86/x64 size_t related warnings