Added case_sensitive property for streamer clauses

Now we can set case sensitivity for the streamer search properties. The clause evaluation in the FilterHandler class looks for this property and compares accordingly. The streamfilter.coffee was also extended to handle this new property.

h/js/streamfilter.coffee

@@ -12,6 +12,7 @@ class ClauseParser
     '[' : 'one_of'
     '#' : 'matches'
     '^' : 'first_of'
+  insensitive_operator : 'i'
 
   parse_clauses: (clauses) ->
     bads = []
@@ -34,14 +35,22 @@ class ClauseParser
         continue
 
       field = parts[0]
+
+      if parts[1][0] is @insensitive_operator
+        sensitive = false
+        rest = parts[1][1..]
+      else
+        sensitive = true
+        rest = parts[1]
+
       operator_found = false
       for operator in @operators
-        if (parts[1].indexOf operator) is 0
+        if (rest.indexOf operator) is 0
           oper = @operator_mapping[operator]
           if operator is '['
-            value = parts[1][operator.length..].split ','
+            value = rest[operator.length..].split ','
           else
-            value = parts[1][operator.length..]
+            value = rest[operator.length..]
           operator_found = true
           if field is 'user'
             value = 'acct:' + value + '@' + window.location.hostname
@@ -55,6 +64,7 @@ class ClauseParser
         'field'   : '/' + field
         'operator': oper
         'value'   : value
+        'case_sensitive': sensitive
     [structure, bads]
 
 
@@ -145,11 +155,12 @@ class StreamFilter
     @filter.clauses.push clause
     this
 
-  addClause: (field, operator, value) ->
+  addClause: (field, operator, value, case_sensitive = false) ->
     @filter.clauses.push
       field: field
       operator: operator
       value: value
+      case_sensitive: case_sensitive
     this
 
   setClausesParse: (clauses_to_parse, error_checking = false) ->