Add support for coloredtext
Add support for \input command

[#73664936]
Remove puts

[Delivers #73664936]
Issue pull request for branch 73664936-input

[Delivers #73664936](https://www.pivotaltracker.com/story/show/73664936)
[Delivers #70812746](https://www.pivotaltracker.com/story/show/70812746)
[Delivers #70476292](https://www.pivotaltracker.com/story/show/70476292)
[Delivers #68462524](https://www.pivotaltracker.com/story/show/68462524)
Merge pull request #105 from softcover/73664936-input

73664936 input
Add support for coloredtexthtml
Recursively input Markdown text

[#74084592]
Add accidentally un-added tests for coloredtexthtml

[#74084592]
Add input support to PolyTeX-to-HTML

[#74084592]
Support file input in PolyTeX PDFs

[Delivers #74084592]
[#74084592]

* 74084592-included-code:
  Support file input in PolyTeX PDFs
  Add input support to PolyTeX-to-HTML
  Add accidentally un-added tests for coloredtexthtml
  Recursively input Markdown text
Bump version number
Subset included code files by line number

This commit adds support for extracting individually specified lines
from an included file.

It also:
changes the syntax for specifying git tagged file inclusions to
'git: {tag: a_tag}'."

fixes a bug where retrieving a git tagged file would overwrite
the current working copy.
Merge branch 'include_code_by_line_number' of https://github.com/skmetz/polytexnic into include_code_by_line_number