Report a warning if the proto file doesn't have a syntax statement.
Fix Python C++ implementation build issues:
  1. Haven't included the include path for "config.h".
  2. Use of C++11 auto keyword.
Replace links in nano proto code.
Add a ./configure flag "DIST_LANG" to select which langauge to include
in a distribution package.
Get rid of some build warnings.
Merge pull request #81 from xfxyjwf/syntax_warning

Report a warning if the proto file doesn't have a syntax statement.
Merge pull request #105 from xfxyjwf/fix_92

Fix Python C++ implementation build issues
Merge pull request #111 from xfxyjwf/googlebot

Replace links in nano proto code.
Merge pull request #115 from xfxyjwf/fix_107

Add a ./configure flag "DIST_LANG".
Merge pull request #116 from xfxyjwf/fix_warnings

Get rid of some build warnings.
Explicitly list all Java lite runtime tests (and exclude those depending
TestUtil which transitively depend on the full runtime).
Merge remote-tracking branch 'github-main/master'