- Switches from pycurl to requests library
- Allows for less janky decoding, especially with non-latin character
sets
- Adds session level management of user configs
- Allows for each session to set its own config (people are probably
going to complain about this, though not sure if it'll be the same
number of people who are upset that their friends/family have to share
their config)
- Updates key gen/regen to more aggressively swap out keys after each
request
* Added country and safe search config options
* Updated handling of parser error in results test
* Improved handling of default country
* Added 1px empty gif fallback as a replacement for images that fail to load
For datetime spans in time-filtered search results, anything less than 7
characters or more than 15 can be guaranteed to not be properly
formatted dates (either "mm dd yyyy" or "xx days/months/weeks ago")
Was previously checking for non-inclusive max number of days (i.e.
filtering by past month would return a failed test if the result was
from exactly 31 days ago)
