Add #egg= markers to requirements.txt

requirements.txt

 numpy
-git+https://github.com/inducer/pytools.git
-git+https://github.com/inducer/pymbolic.git
-git+https://github.com/inducer/islpy.git
-git+https://github.com/inducer/pyopencl.git
-git+https://github.com/inducer/loopy.git
-git+https://gitlab.tiker.net/inducer/dagrt.git
-git+https://gitlab.tiker.net/inducer/leap.git
-git+https://github.com/inducer/meshpy.git
-git+https://github.com/inducer/modepy.git
-git+https://github.com/inducer/meshmode.git
+git+https://github.com/inducer/pytools.git#egg=pytools
+git+https://github.com/inducer/pymbolic.git#egg=pymbolic
+git+https://github.com/inducer/islpy.git#egg=islpy
+git+https://github.com/inducer/pyopencl.git#egg=pyopencl
+git+https://github.com/inducer/loopy.git#egg=loo.py
+git+https://gitlab.tiker.net/inducer/dagrt.git#egg=dagrt
+git+https://gitlab.tiker.net/inducer/leap.git#egg=leap
+git+https://github.com/inducer/meshpy.git#egg=meshpy
+git+https://github.com/inducer/modepy.git#egg=modepy
+git+https://github.com/inducer/meshmode.git#egg=meshmode