Fix alphabetical ordering of 3rd party extensions
Add project information to HTML docs sidebar
Show Github source link on Readthedocs
Clarify requirements [#332]

Especially with regards to external checker programs, as surprisingly
there seems to be some confusion about these
Explain the need of source-inplace for Pylint

[ci skip]
Avoid warnings about missing main() in rustc

We try to build the create as library, to avoid warnings about missing
main() functions.
Add flycheck-rust-library-path option

Allows the user to specify paths to libraries, for extern mod
Rebuild info manual
Fix the name of the include directory for C/C++ tests
Add flycheck-dmd-include-path variable [#343]

The new variable passes in the include directories to dmd with the "-I" flag.
Refactor D tests

Move all D source files into a sub-directory, to create a package
hierarchy.
Add test for missing D import
Remove superfluous D test cases
Wrap overlong line
Update changelog and credits
[Fix #344] Merge branch 'atilaneves-d-dmd-includes'

* atilaneves-d-dmd-includes:
  Update changelog and credits
  Wrap overlong line
  Remove superfluous D test cases
  Add test for missing D import
  Refactor D tests
  Add flycheck-dmd-include-path variable [#343]
Rebuild Texinfo manual