Adstex

- Setting a timeout value for online version check to avoid hanging. Thanks to birnstiel for pointing this out.

- `adstex` now can just update a bibtex file (i.e., when no tex source files needed)
- `adstex` now ignores (almost all) comments in tex source file
- `adstex` now automatically identifies the bibtex files by scanning the tex source file (i.e, `-o` is no longer required)
- `adstex` now backs up the bib file that it will overwrite
- `adstex` now checks if a newer version of `adstex` is available on pypi
- `adstex` option `--force-update` is renamed to `--force-regenerate` for clarity

This release will be available on pypi shortly.

- Reverse the order of possible choices in the case of the author+year search so that the most likely one is at the bottom and the user doesn't need to scroll up.

This update makes adstex work with bibtexparser>=1.0.0, and also fixes a bug related to an ads API issue.

first release to pypi