MAINT: Upgrade dependent package versions, add pip-tools

pandas==0.11.0, Cython==0.19.1, TA-Lib==0.4.6, requests==1.2.3,
delorean==0.2.1, nose-parameterized==0.3, pyflakes==0.7.2

Also add pip-tools==0.3.4 to requirements_dev.txt.