Fix #4 by removing dependency on bootstrap theme

DESCRIPTION

 Package: regexplain
 Title: Rstudio addin to help you with your regexes (in progress)
-Version: 0.1.0
+Version: 0.1.1
 Date: 2018-03-07
 Authors@R: c(
     person("Garrick", "Aden-Buie", email = "g.adenbuie@gmail.com", role = c("aut", "cre")),

R/run_regex.R

   if (!render) return(res)
   head <- c(
     "---", "pagetitle: View Regex", "---",
-    "<h5>Regex</h5>",
-    "<p><pre style = 'font-size: 1em;'>", wrap_regex(pattern, escape, exact), "</pre></p>",
-    "<h5>Results</h5>"
+    "<h5 style = 'font-size: 1.1em'>Regex</h5>",
+    "<p><pre style = 'font-size: 1.25em;'>", wrap_regex(pattern, escape, exact), "</pre></p>",
+    "<h5 style = 'font-size: 1.1em'>Results</h5>"
   )
   res <- c(head, res)
   tmp <- tempfile(fileext = ".Rmd")
   tmp_html <- suppressWarnings(
     rmarkdown::render(
       tmp,
-      output_format = rmarkdown::html_document(css = system.file('style.css', package='regexhelp')),
+      output_format = rmarkdown::html_document(css = system.file('style.css', package='regexhelp'), theme = NULL),
       quiet = TRUE
   ))
   rstudioapi::viewer(tmp_html)

Readme.Rmd

 title: "regexplain"
 output: github_document
 ---
-[![packageversion](https://img.shields.io/badge/Package%20version-0.1.0-orange.svg?style=flat-square)](commits/master)
+[![packageversion](https://img.shields.io/badge/Package%20version-0.1.1-orange.svg?style=flat-square)](commits/master)
 ![](https://img.shields.io/badge/lifecycle-needs_testers-yellow.svg)
 [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)
 [![CRAN_Status_Badge](http://www.r-pkg.org/badges/version/regexplain)](https://cran.r-project.org/package=regexplain)

Readme.md

 regexplain
 ================
 
-[![packageversion](https://img.shields.io/badge/Package%20version-0.1.0-orange.svg?style=flat-square)](commits/master)
+[![packageversion](https://img.shields.io/badge/Package%20version-0.1.1-orange.svg?style=flat-square)](commits/master)
 ![](https://img.shields.io/badge/lifecycle-needs_testers-yellow.svg)
 [![Project Status: Active – The project has reached a stable, usable
 state and is being actively