Print offending files with php-lint and accommodate paths with spaces

[posita]

Fixes #18 and #22.
Includes some minor README.md cleanup.

[posita]

Before:

% pre-commit run --verbose --all-files
…
PHP Syntax Check (Comprehensive).........................................Failed
- hook id: php-lint-all
- duration: 7.74s
- exit code: 1

Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
────────────────────────────────────────────────────────────────────────────────
2 PHP Parse error(s) were found!
────────────────────────────────────────────────────────────────────────────────
Begin PHP Linter
Begin PHP Linter
────────────────────────────────────────────────────────────────────────────────
1 PHP Parse error(s) were found!
────────────────────────────────────────────────────────────────────────────────
Begin PHP Linter

After:

% pre-commit run --verbose --all-files
…
PHP Syntax Check (Comprehensive).........................................Failed
- hook id: php-lint-all
- duration: 7.74s
- exit code: 1

Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
Begin PHP Linter
Could not open input file: src/…/HasA
Could not open input file: SpaceInItsName.php
────────────────────────────────────────────────────────────────────────────────
2 PHP Parse error(s) were found!
────────────────────────────────────────────────────────────────────────────────
Begin PHP Linter
Begin PHP Linter

Fatal error: Cannot use "self" when no class scope is active in src/…/foo.php on line 255
Errors parsing src/…/foo.php
────────────────────────────────────────────────────────────────────────────────
1 PHP Parse error(s) were found!
────────────────────────────────────────────────────────────────────────────────
Begin PHP Linter

[posita]

Friendly ping. Any interest in landing this?

[posita]

Any interest, or has this project been abandoned?