Basic travis-ci config

[jayvdb]

https://travis-ci.org/jayvdb/httplib2/builds/42097318

Some tests are failing because of a problem with the test server http://bitworking.org/projects/httplib2/test/303/303.cgi

We can remove dependency on the bitworking server for the asis test files by using https://pypi.python.org/pypi/asis

Most of the dynamic cgi tests could be rewritten as asis test files.

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This change is 

[jayvdb]

Note that appengine appears to no longer support 2.6. Makefile is currently coded to run the appengine tests on 2.6. is there an older zip which does support 2.6 ?

https://travis-ci.org/jayvdb/httplib2/jobs/42097321