* Set execute bit on files if and only if they begin with (#!).
Git only tracks the 'x' (executable) bit on each file. Prior to this
CL, our files were a random mix of executable and non-executable.
This change imposes some order by making files executable if and only
if they have shebang (#!) lines at the beginning.
We don't have any executable binaries checked into the repo, so
we shouldn't need to worry about that case.
* Added fix_permissions.sh script to set +x iff a file begins with (#!).
* Down-integrate internal changes to github.
* fix python conformance test
* fix csharp conformance test
* add back java map_lite_test.proto's optimize for option
* fix php conformance test
* Fix php well known type conformance tests
* Properly generate code for test.proto
* Provide GPBMetadata files in c extensions for generated files to import.
* Remove unnecessary test
* Clean up code
* Add declaration for initOnce.
* Refactoring
* Reserve unknown in ruby
* Revert ruby tests. Wait for cpp impl for conformance test
* Add conformance test for preserving unknown
* Add unknown field conformance test to csharp failure list.
* Fix comments
* Fix comment
* Fix comments
* Fix typo
* Use stringsink_string directly
* Mark hd unused
* Remove unused encodeunknown_handlerfunc
This better shows the semantic of the API. For already setted fields,
mergeFromString do replacement for singular fields and appending for
repeated fields.
