* BREAKING CHANGE: Changed semantics of `Navigator` protocol `select*` in order to enable very large performance improvements to `select`, `select-one`, `select-first`, and `select-one!`. Custom navigators will need to be updated to comform to the new required semantics. Codebases that do not use custom navigators do not require any changes. See the docstring on the protocol for the details.
* Added `select-any` operation which selects a single element navigated to by the path. Which element returned is undefined. If no elements are navigated to, returns `com.rpl.specter/NONE`. This is the fastest selection operation.
* Huge performance improvements for `if-path`, `cond-path`, `selected?`, and `not-selected?`, especially for condition path containing only static functions
* Added :notpath metadata to signify pathedfn arguments that should be treated as regular arguments during inline factoring. If one of these arguments is not a static var reference or non-collection value, the path will not factor.
* New `path` macro does intelligent inline caching of the provided path. The path is factored into a static portion and into params which may change on each usage of the path (e.g. local parameters). The static part is factored and compiled on the first run-through, and then re-used for all subsequent invocations. As an example, `[ALL (keypath k)]` is factored into `[ALL keypath]`, which is compiled and cached, and `[k]`, which is provided on each execution. If it is not possible to precompile the path (e.g. [ALL some-local-variable]), nothing is cached and the path will be compiled on each run-through.
* BREAKING CHANGE: all `select/transform/setval/replace-in` functions changed to macros and moved to com.rpl.specter.macros namespace. The new macros now automatically wrap the provided path in `path` to enable inline caching. Expect up to a 100x performance improvement without using explicit precompilation, and to be within 2% to 15% of the performance of explicitly precompiled usage.
* Added `select*/transform*/setval*/replace-in*/etc.` functions that have the same functionality as the old `select/transform/setval/replace-in` functions.
* Added "navigator constructors" that can be defined via `defnavconstructor`. These allow defining a flexible function to parameterize a defnav, and the function integrates with inline caching for high performance.
* Added params-reset which calls its path with the params index walked back by the number of params needed by its path. This enables recursive parameterized paths
* Added nil->val, NIL->SET, NIL->LIST, and NIL->VECTOR selectors to make it easier to manipulate maps (e.g. (setval [:akey NIL->VECTOR END] [:a :b] amap) to append that vector into that value for the map, even if nothing was at that value at the start)
* Added late-bound parameterization feature: allows selectors that require params to be precompiled without the parameters, and the parameters are supplied later in bulk. This effectively enables Specter to be used in any situation with very high performance.
