Update description of NATIVE_SEARCH feature in TaskRepository
IDEA-111811 Task management: JIRA: JQL: code completion suggests nothing after closing parenthesis

Add new PsiElement and IElementType for JQL subclauses
Change JqlQuery methods, JqlTerminalClause should extend JqlClause
Reflective PsiElements creation in JqlParserDefinition
Add several tests of date parsing
Refactor TemplateVariable
Migrate Assembla to new GenericRepository
Merge remote-tracking branch 'origin/master'
isValuesCustomSorted, add or not SortValuesAction (alphabetically sort)
TODO: this action should be moved to "Variables" as gear action