Now with taskbar icon!

Small fixes and additions since v0.2.5

• Add: PyChimera logo will be used as taskbar icon!
• Recipe: pin pcre to avoid issues with Jupyter Notebook installations
• Docs: add FAQ on ugly fonts in some cases (bad conda tk)
• Fix: if $CHIMERADIR contains ~, it will be now properly expanded to $HOME. More fixes in OSX support.

As usual, it can be installed with pip install pychimera or conda install -c insilichem pychimera. Refer to the docs for further info.