Enable conversion from URDF content (#158)

* enable conversion from urdf content

* fix + new test

* use stdin

* prepare 1.15

* Update README.md

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

* current directory for realtive paths

* Apply suggestions from code review

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

Prepare version 1.0.14 (#150)

Fix kuka base_link download link (#144)

Merge pull request #141 from cyberbotics/prepare-version-1.0.12

Creation of version 1.0.12

Version 1.0.11

Merge pull request #130 from cyberbotics/fix-rootlink-search

Fix root link search

Update README.md (#108)

Merge pull request #84 from cyberbotics/add-test-main

Add 'main' functions to test.

Merge pull request #66 from cyberbotics/fix-missing-string-end

Fix missing string end

Merge pull request #62 from cyberbotics/enhancement-add-fields

Add More PROTO Fields.