Issue 3289: substitute warnings for print statements
change print to warning. missing import statement
Merge remote-tracking branch 'upstream/master'
fixed warnings statements in pretty_symbology.py
Split physics.mechanics examples into multiple files.
Edited the docstring for ReferenceFrame.orient().
Merge branch 'mechanicsdoc'
lxml instead of libxml2 for c2p, google app engine supports lxml and generally better supported
Changed title to be consistent with other Physics/Mehcanics titles.
Got bicycle example working by adding a q3 dynamicsymbol.
Gave the rolling disc image a more descriptive file name.
Gave the rolling disc image a more descriptive file name.
Gave the rolling disc image a more descriptive file name.
Updated documentation to reflect change in figure file name.
Got all physics mechanics tests to work again, in part by splitting them into more files.
Got all physics mechanics tests to work again, in part by splitting them into more files.
empty line made quality test fail
apply_xsl real doctest instead of just usage example
doctest_depends_on added, doctest corrected
Addition of hypertangent and exponential cases to parametric differntial equations

 added code exponential for to special denom

added code for tangent cases to special denom

added code for tangent cases to special denom

First attempt to solve the section 5.12

first attempt to solve section 5.12 and related problems

First Attempt to implement section 5.12 and related problems

added hypertangent test cases for param special

deleted binary file