updated tab alignment
removed pointless integer hack-esqe code
got rid of false_number() as signing is no longer done as part of isnum()
added ability to pass decimals to rand()
improved get_precision()
changed code type checking to macros
small changes
a few more small changes
improved comparison correctness
added comparison tests
fixed up chars for words
added gradian mode (like anyone uses it)
added tests for gradian trig
added gradians to gui
test.py -> python3
updated travis
added windows installer
give more information for windows installer
install -> win
added install instructions