Adjusted the constraints for the main window to avoid overlap between the file browser and the tab view.
Reverted the theme manager back to solarize light.
Added a basic implementation of the PLAutocompleteViewController.

This class is a NSTableViewDelegate and follows the PLThemeable protocol. It includes an interface file with a NSTableView and the PLAutocompleteDataSource as the data source.

The PLAutocompleteDataSource follows the NSTableViewDataSource protocol. It has a NSMutableArray instance variable that will store the completion options. It implements the two required methods for this protocol.

The PLEditorViewController now has a PLAutocompleteViewController instance variable. In its setThemeManager: method, it calls the same method of the PLAutocompleteViewController object.
PLAutocompleteViewController exposes its tableView instance variable as a property. PLAutocompleteDataSource instance variable, completions, is now a NSArray property.
The autocomplete view now follows the text as it is input.

In the PLEditorViewController delegate method textStorageWillProcessEditing, the frame of the autocompleteViewController is set to align with the left of the current character immediately below it. This is done by getting the bounding rect of the glyph range from the edited text using the textEditorView layoutManager.

For testing, when the PLEditorViewController is initialized, it adds the autocomplete view as a subview and provides a dummy array of text as completions.
PLEditorViewController has a simplified editedRange instance variable rather than editedLineRange.

The PLSyntaxHighlighter has been adjusted to reflect this change. Using the editedRange rather than the editedLineRange improves the clarity of the interface between these two classes.
Merge branch 'develop' into feature-autocomplete

Conflicts:
	Liasis/Liasis/TextEditor/PLEditorViewController.h
Merge branch 'feature-autocomplete' into feature-custom_autocomplete

Conflicts:
	Liasis/Liasis/TextEditor/PLEditorViewController.h
	Liasis/Liasis/TextEditor/PLEditorViewController.m
Autocomplete view is now hidden on start, is displayed when non-whitespace is entered, and hidden when whitespace is entered.
Autocomplete view now hides on delete to temporarily fix an exception when determining location after deletion.

Moved the logic for positioning the autocomplete view into a separate method in the PLEditorViewController.
Implemented a workaround solution to get the autocompletion window to fix its x-position at the start of a new word.

PLEdtiorViewController now has a shouldSetAutocompleteViewPosition instance variable. The following is the order of events:

1) Set its value is YES if the previous character entered was whitespace and the current input is not (determined in textView:shouldChangeTextInRnage:replacementString).
2) Here, the text has not been entered yet, so we cannot use the layout manager to determine the glyph position.
3) The previousEntry instance variable is reset.
4) If shouldSetAutocompleteViewPosition is YES, set the position in textStorageDidProcessEditing: method -- this is AFTER the text has been entered so we can use the layout manager properly.
PLEditorViewController's textEditorView no longer resizes its subviews: the autocomplete view position now remains fixed when the window is resized.
Properly check row index against length of completions in PLAutocompleteDataSource.

This prevents an exception that was thrown calling tableView:objectValueForTableColumn:row.
PLEditorViewController now populates the autocomplete view.

In the textStorageDidProcessEditing: method:

1) Determine the partial word being entered. This uses a new method in the PLEditorViewController, previousWhitespacePosition:fromPosition: to iterate backwards from the current location until finding the previous whitespace or newline character.
2) Use the partial word to search for matches in the autocompleteVariables instance variable. The logic for finding completions in a string has been moved to the completionsInString:forPartialWordRange: method.
3) Set the completions instance variable of the autocompleteViewController's tableView dataSource with this array of completiosn.
PLEditorViewController now reloads autocompletion suggestions when the autocompletions view is not hidden.

No longer initialize autocompleteViewController with dummy variables.
Merge branch 'feature-custom_autocomplete' of https://github.com/dnicklas/Liasis into feature-custom_autocomplete