Prettier try-catch code generation, fix issue #27

This causes try-catch code blocks to be indented appropriately, before:
```lua
local try, catch = pcall(function () print("Try.") end);
if try == false then 
local _ = catch;
print("Catch.")end 
```
after:
```lua
local try, catch = pcall(function ()
	print("Try.")
end);
if try == false then
	local _ = catch;
	print("Catch.")
end
```
And also fixes https://github.com/PeyTy/LuaXe/issues/27 (the end-statement from the issue is still a question though).