data: Saving TokenLocations in Storage

This change adds structures for saving TokenLocations in the Storage and improves the location derival in the
ASTVisitor:
* TokenLocation saves an Id of a Token. For each Token two TokenLocations are created for both start- and endpoint. They
  keep a reference to each other and know whether they are start or end.
* TokenLocationLine saves all TokenLocations in a line and the lineNumber.
* TokenLocationFile saves all TokenLocationLines of a specific file and the filePath.
* TokenLocationCollection saves multiple TokenLocationFiles.
* TokenLocation can derive it's lineNumber and filePath through references to first TokenLocationLine and from there to
  TokenLocationFile.

src/lib/data/location/TokenLocation.cpp

@@ -0,0 +1,126 @@
+#include "data/location/TokenLocation.h"
+
+#include "data/location/TokenLocationLine.h"
+
+TokenLocation::TokenLocation(Id tokenId, TokenLocationLine* line, unsigned int columnNumber, bool isStart)
+	: TokenLocation(s_locationId++, tokenId, line, columnNumber, isStart)
+{
+}
+
+TokenLocation::TokenLocation(Id id, Id tokenId, TokenLocationLine* line, unsigned int columnNumber, bool isStart)
+	: m_id(id)
+	, m_tokenId(tokenId)
+	, m_line(line)
+	, m_columnNumber(columnNumber)
+	, m_other(nullptr)
+	, m_isStart(isStart)
+{
+}
+
+TokenLocation::~TokenLocation()
+{
+}
+
+Id TokenLocation::getId() const
+{
+	return m_id;
+}
+
+Id TokenLocation::getTokenId() const
+{
+	return m_tokenId;
+}
+
+TokenLocationLine* TokenLocation::getTokenLocationLine() const
+{
+	return m_line;
+}
+
+TokenLocationFile* TokenLocation::getTokenLocationFile() const
+{
+	return m_line->getTokenLocationFile();
+}
+
+unsigned int TokenLocation::getColumnNumber() const
+{
+	return m_columnNumber;
+}
+
+unsigned int TokenLocation::getLineNumber() const
+{
+	return m_line->getLineNumber();
+}
+
+const std::string& TokenLocation::getFilePath() const
+{
+	return m_line->getFilePath();
+}
+
+TokenLocation* TokenLocation::getOtherTokenLocation() const
+{
+	return m_other;
+}
+
+void TokenLocation::setOtherTokenLocation(TokenLocation* location)
+{
+	m_other = location;
+}
+
+TokenLocation* TokenLocation::getStartTokenLocation()
+{
+	if (m_isStart)
+	{
+		return this;
+	}
+	else
+	{
+		return m_other;
+	}
+}
+
+TokenLocation* TokenLocation::getEndTokenLocation()
+{
+	if (!m_isStart)
+	{
+		return this;
+	}
+	else
+	{
+		return m_other;
+	}
+}
+
+bool TokenLocation::isStartTokenLocation() const
+{
+	return m_isStart;
+}
+
+bool TokenLocation::isEndTokenLocation() const
+{
+	return !m_isStart;
+}
+
+std::shared_ptr<TokenLocation> TokenLocation::createPlainCopy(TokenLocationLine* line) const
+{
+	return std::shared_ptr<TokenLocation>(new TokenLocation(m_id, m_tokenId, line, m_columnNumber, m_isStart));
+}
+
+Id TokenLocation::s_locationId = 1;
+
+std::ostream& operator<<(std::ostream& ostream, const TokenLocation& location)
+{
+	if ((&location)->isStartTokenLocation())
+	{
+		ostream << "<";
+	}
+
+	ostream << location.getColumnNumber() << ":[" << location.getTokenId() << "]";
+
+	if ((&location)->isEndTokenLocation())
+	{
+		ostream << ">";
+	}
+
+	ostream << " ";
+	return ostream;
+}