`--break` (user breakpoint) improvements

[Arinerron]

• Support using commas, semicolons, ' || ', and OR to separate multiple breakpoints in a single --break (note that you can currently use multiple --break arguments instead).
• Add abort again
• Add support for --break='#3' (number sign before oid)
• Support using AND and && operators to add additional requirements
• Support more operators. Namely /, *, ^, **, &, |, ~, !=.
• Eventually support parentheses too.
• Test more! :( It's stable enough for now but still
• --break 'realloc.arg[1]=0x1000' - support checking arguments of functions
• --break 'malloc.return=0x7f123412' - support checking return values of functions
• Support dynamic functions. We need to standardize the symbol resolving code.
• Make the program breakpoints array dynamically sized (linked list) so that we can define as many breakpoints as we want.
• Need to document this argument still...
• (slightly related) convert --symbol to use this parsing code!

See #64 for original features list.

[Arinerron]

d854806 adds the first batch of these