LevelDB version 1.11.0.
Merge branch 'next' into leveldb_update

Conflicts:
	src/vault
Merge branch 'next' into leveldb_update

Conflicts:
	src/drive
Fix for MSVC x64 builds.
Moved leveldb tests to Commonn and set to build if MaidsafeTesting is true.
Added boost dependency fix.
Updated use of protoc.
No longer require pre-build compilation of protoc.
No longer generates pb files into source tree.
Fixed bug in add_protoc_command CMake module.
Added example folder and dummy project.
update to compile with libc++abi and clang
Upgraded to boost 1.54.0.
Decrease minimum Clang version to 3.2.
Further changes to the CI script.
Bugfix in CI script.
Added READMEto examples folder.
Moved README in examples folder.
Fixes Mac - level-db build issues.
Merge pull request #107 from chandraprakash/next

Fixes Mac - level-db build issues.
Merge branch 'next' into leveldb_update
Changed LevelDB test folder name.
Couple of CMake-related bugfixes.