Modify run_tests_if_main() to bypass nose.
Modify run_tests_if_main() to bypass nose.

Just run all functions in the script that start with 'test_'.
In this way when there is an error, I can just jump to PM
debug mode in my IDE and inspect what's wong. Nose first runs
all tests and then displays a traceback. I want to *go* there.

srinathv/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,Eric89GXL/vispy,kkuunnddaannkk/vispy,srinathv/vispy,srinathv/vispy,ghisvail/vispy,inclement/vispy,julienr/vispy,kkuunnddaannkk/vispy,jay3sh/vispy,RebeccaWPerry/vispy,RebeccaWPerry/vispy,drufat/vispy,bollu/vispy,sh4wn/vispy,bollu/vispy,jdreaver/vispy,drufat/vispy,bollu/vispy,hronoses/vispy,sbtlaarzc/vispy,michaelaye/vispy,jay3sh/vispy,QuLogic/vispy,dchilds7/Deysha-Star-Formation,julienr/vispy,inclement/vispy,dchilds7/Deysha-Star-Formation,sh4wn/vispy,hronoses/vispy,jay3sh/vispy,jdreaver/vispy,sbtlaarzc/vispy,ghisvail/vispy,QuLogic/vispy,michaelaye/vispy,Eric89GXL/vispy,hronoses/vispy,inclement/vispy,sh4wn/vispy,dchilds7/Deysha-Star-Formation,QuLogic/vispy,jdreaver/vispy,RebeccaWPerry/vispy,sbtlaarzc/vispy,julienr/vispy,michaelaye/vispy,Eric89GXL/vispy,drufat/vispy