rhysd/hgrep v0.3.7 on GitHub

Support many text encodings. Previously only UTF-8 was supported. (#21)
- Add --encoding (-E) command line option to specify file encoding of matched files. For example, the following command searches files encoded in Shift JIS.
```
hgrep --encoding sjis pattern path/to/dir
```
- Detect file encodings from BOM. hgrep can automatically detect UTF-16LE, UTF-16BE, and UTF-8 if BOM exists in the file.
Fix some syntax detection fails when BOM is inserted at the head of file. (#20)
Improve performance by removing redundant read system calls on detecting syntax.
Improve error messages when failing to read files.