1.1 (#39)

* added ~> operator

* added ~> operator

* added extra ~> tests

* add regex support

* $replace handles replacement pattern $nnn properly; $replace can use a replacement function instead of pattern

* added function signature syntax; errors now use error codes

* add $trim function

* small internal change to lambda object

* added CHANGELOG.md

CHANGELOG.md

@@ -0,0 +1,18 @@
+#### 1.1.0 Milestone Release
+
+- New syntax to create regular expressions
+- Enhanced `$split` function to support regex parameter
+- New functions
+    - `$contains` - tests existence of string/regex in a string
+    - `$match` - returns an object representing matches against a regex
+    - `$replace` - replaces occurrences of a substring or regex in a string
+    - `$trim` - removes excessive whitespace in a string
+- Function chaining operator `~>`
+    - allows multiple functions to be applied without excessive nesting
+- Context substitutable function parameters
+    - allows functions to implicitly operate on the context value
+- Function signature syntax
+    - to support runtime validation of function arguments
+- Errors now have error codes
+    - messages maintained in separate catalog
+