Fa

Use of cache for when using `symbols()` function in order to find all symbols for selected project.
If a symbol has been previously searched for during this operation using the `find` command, or just by it being a `.sig` file, it's now stored so FA won't have to search for it again.

The cache resets when the `symbols()` function finishes.

* Raname commands: `checkpoint` -> `store`, `back-to-checkpoint` -> `load`
* Parse all integers as python-eval expressions
* Save-temp-sig function now just copies the file as-is, instead of reserializing it.
* Add the following command for conditional branches: `label`, `b`, `if`, `python-if`
* Add `symdiff` command for symmetric-difference operation

* Improve export within IDA
* Add interpertation time for each SIG file into stdout.
* Auto-generate sublime completions so they are always up to date.

* Add commands: `argument`, `intersect`
* Deprecate use of: `and`, `or`, `xrefs-to`. Will be removed in v0.2.0

* Improve IDA export options.
* Remove annoying prompt when executing find-last-sig within IDA.
* Add log for every interpreted SIG file.
* All `.py` and `.sig` files are now sorted before running for allowing running-order control.

* Add command `and`
* Add command `or`
* Add optional cmd for `function-start`