Merge pull request #521 from mikeferguson/indigo-devel

attempt to fix #519
update changelog
0.6.1
Merge pull request #522 from mikeferguson/indigo-devel

add dependency on std_srvs (part of octomap clearing service)
update changelog
0.6.2
GL_TYPE() is a function in newer versions of OpenGL, this fixes tests on Ubuntu 14.04