Use static page if there are no clang warnings.
Merge pull request #33 from fwalch/no-clang-warnings

Use static page if there are no clang warnings.
Fix clang report if there are no warnings.
Merge pull request #34 from fwalch/no-clang-warnings-hotfix

Fix clang report if there are no warnings.
Fix clang report failure when no warnings.
Merge pull request #32 from elmart/clang-empty-report

Fix clang report failure when no warnings.
Fix clang report failure when no warnings: Fix problems.

- Missing space in conditional.
- File permissions.
- Lower max bugs to 20.
Merge pull request #35 from elmart/clang-empty-report-2

Fix clang report failure when no warnings: Fix problems.
travis: disable email notification on success
Travis: Allow Coverity to fail.
Merge pull request #37 from fwalch/allow-coverity-failure

Travis: Allow Coverity to fail.
Support multiple OS.
Merge pull request #36 from fwalch/multi-os

Multi-OS support
Fix setting up prebuilt dependencies.
Merge pull request #38 from fwalch/fix-dependencies

Fix setting up prebuilt dependencies.
Clang report: Fix empty report showed when warnings present.

Problem  : Empty error is being showed even if there are warnings.
Cause    : scan-build --status-bugs is working, but checked status is
           that of the pipe, not scan-build's one.
Solution : Set option `pipefail` so that pipe status is that of the last
           failing command.
Merge pull request #40 from elmart/clang-report-not-showing

Fix clang empty report showed when warnings present.