Pyppl-report

- Add directory of outfile to resource-path
- Fix alignment error in filetable filter
- Add download link for non-standalone mode
- Allow links in filetable in Markdown format
- Add tests for filters
- Save common static files in common directory instead to avoid redundant files for non-standalone mode

- Add non-standalone mode for html reports
- Fix bug when disabling report generating report for individual process using `proc.report = False`

- Ignore title if md doc has h1 for command line mode.
- Force adding title even if md doc has h1.

- Rename to pyppl_report due to inability of dash in entry point
- Report time elapsed for generating reports
- Use template.html instead of standalone.html for templates
- Add loading mask for template bootstrap
- Fix not jumping to collapse head when expanded
- Fix table header being overlapped in pdf mode
- Remove scripts in pdf mode

- Add `pyppl_report` command to convert external markdown files as well
- Suport PDF output: 1

- Add image preview for theme bootstrap
- Format numbers for filetable filter