Release version 1.5

Merge pull request JessicaTegner#129 from ickc/bump-version

version bumped, README reflect change in new version

pypandoc 1.3.3

Only fixes the build process on travis/appveyor to get a proper sdist on pypi

pypandoc 1.3.1

Fix sdist (1.3.0 contained the pandoc binaries)

Version 1.3.0

* Add possibility to use .lua custom writers as output format
  (thanks to @snay, JessicaTegner#109)
* pypandoc now also accepts URls (http+https) where it allows paths (JessicaTegner#108/JessicaTegner#115,
  thanks to @dufferzafar for reporting this)
* now downloads pandoc 1.18 (or includes that pandoc version in the prebuild
  wheels) (JessicaTegner#112/JessicaTegner#113, thanks to @TomAugspurger for reporting this)

Under the hood, we now also do CI tests on windows (via appveyor) and do PyPI
uploads from the CI services (see JessicaTegner#116/JessicaTegner#117).

Version 1.2.0

This version includes a new API: instead of using `convert(file_or_string)` use
`convert_file(file_name)` or `convert_text(string)`. This change was nesessary
because it wasn't clear in all cases whether an input was meant to be a file or
a string. This could lead to wrong output.

This also includes a convenience function to download pandoc itself (on intel
based systems):
`from pypandoc.pandoc_download import download_pandoc; download_pandoc()`

Also included are fixes for reported bugs.

Thanks to all contributors!

Included PRs:

  * Merge pull request JessicaTegner#104 from tkob/supply-home
    Ensure $HOME is set before calling `pandoc --version`
  * Merge pull request JessicaTegner#101 from janschulz/pdf
    Fix for pdf conversion
  * Merge pull request JessicaTegner#102 from janschulz/readme
    Fix conda badge
  * Merge pull request JessicaTegner#96 from janschulz/new_main_api
    New main api: convert_file and convert_text
  * Merge pull request JessicaTegner#99 from gwgundersen/master
    Added section on specifying the location of pandoc binaries.
  * Merge pull request JessicaTegner#95 from janschulz/update_pandoc
    Bugfix for search path and update to newer pandoc version
  * Merge pull request JessicaTegner#92 from JanSchulz/overhaul_pandoc_handling
    overhaul pandoc downloads
  * Merge pull request JessicaTegner#93 from pycontribs/master
    Fixed installation and execution of tests on Mac OS X.
  * Merge pull request JessicaTegner#89 from JanSchulz/release_checklist
    Add a release checklist

Version 1.1.3

- parse input formats with twiki correctly

Version 1.1.2

- raise the right eror if pandoc is not found
- add a function toget the path to pandoc
- update readme

Bump version

Bump version