Merging from upstream:
pointbiz/bitaddress.org@76704bfce2 - "v2.7.6 increase seed pool size. show seed pool while moving mouse. add textbox for keyboard entropy. do not generate address without human added entropy. browser fingerprint entropy added to seed pool starting in a random position. whole seed pool initialized with getRandomValues."
pointbiz/bitaddress.org@d389e975fe - "Change pool size back to 256 bytes."
pointbiz/bitaddress.org@3d135f7ea6 - "v2.8.0 visualize entropy collection"
pointbiz/bitaddress.org@b6fb655b3a - "v2.8.1 […] Fix mouse movement visualization for Firefox and IE."